Definitions starting with o

• obelisk A slender monolithic shaft with a square perimeter and a pyramidal cap.
• object Real or virtual entities which can be individually identified.
• object naming Various versions of recognized text identifiers for an object.
• observation A place used primarily as a viewpoint with a vantage over a city, landscape, or activity.
• observation Data sources received as first-hand sensory input by the person entering the data.
• observation area closes permanently A room or deck for high observation is closed to the public, without prospect for re-opening.
• observation area opens A public room or deck for high observation opens to the general public.
• observation deck height The distance from base level to the highest outdoor public viewing area.
• observation floor height The distance from base level to the highest indoor public viewing area.
• observation ride A structure fixed to the ground with moving cabins or platforms that give riders an enjoyable perspective.
• observation tower A tower designed to give people high views over the surrounding area.
• observatory A site for telescopic or other observation and visual exploration of outer space.
• occupancy permit issued A legal certificate is issued by the government allowing occupancy of a structure to begin.
• occupancy zone A section of a structure occupied by a single tenant or related group of tenants.
• occupational safety and health A firm which ensures compliance with safety and health laws at a building site.
• oceanic shipping route A navigable water route across oceans and/or seas.
• ochre A dull, brownish shade of orange.
• octagon A roughly even 8-sided floor plan.
• octopus ride An amusement ride with multiple rings of cabs, each attached to a different rotating arm.
• office Places for desk-based work where people administer any kind of activities.
• office area Total open floor area used for office space.
• office building A building used for desk-based businesses.
• office condominium Non-industrial working space divided into separate owner-occupied units.
• office supply store A retail site specializing in office products and equipment, such as paper, ink, and office electronics.
• official dedication A ceremony or declaration for the opening of a structure is held by its owner, developer, or manager.
• official legal name The complete official name of an entity as registered with the government.
• official records Printed or written documents which were clearly produced by an authoritative source.
• official website The primary URL pertaining to an object and sanctioned by the controlling entity of that object.
• official website An internet page maintained by a person or organization with a professional involvement in the data topic.
• oil blue An extremely dark blackish shade of blue or very dark teal.
• oil distribution A fixed facility used in the movement of petroleum from its point of extraction to a refinery or point of sale.
• oil extraction A facility for extracting petroleum from the earth.
• oil heating Heat is generated by burning petroleum or other oil products on the site.
• oil-burning power plant A facility for generating electric power by burning petroleum fuel.
• old catholic church A house of worship in a branch of the Catholic faith which has broken with Roman authority.
• olive A dull, medium-to-dark shade of brownish green.
• oncology Clinical space for medical care and diagnosis of persons with cancer.
• onion dome A roof cap with a round base, pointed top, and bulging profile.
• only small pets allowed No large domestic animals are allowed to enter or to be kept on the premises.
• open angle A floor plan with 2 wings meeting at an angle.
• open floor plan Column-free space in large units or suites of office and industrial space.
• open framework A roof structure dominated by an open latticework of beams or tubes.
• open pit An excavated hole in the earth bounded on all sides and fully open to the atmosphere.
• open-air ground floor More than 50% of a building's footprint is unenclosed at the ground level.
• open-air structure A building or shelter where most of the interior space is not fully enclosed.
• openable windows Windows which can be opened to let outside air circulate inside.
• opening hours The scheduled times when a particular usage is made accessible.
• opera house A venue for live performances of operas before an audience.
• operational wind resistance The wind speed at which a structure must cease operations or evacuate occupants.
• ophthalmology Clinical space where doctors treat patients for conditions affecting the eyes.
• optometry Clinical space where doctors measure the vision of patients and prescribe corrections.
• orange Colors with a orangish hue, ranging from light peach to very dark orange or vermillion.
• orange Medium orange, about halfway between yellow and red.
• orchard A distinct area of intentionally planted trees intended for harvesting.
• orchid A light but not too pale shade of purple.
• ore storage Space for bulk storage of raw metal-bearing stone extracted from the earth.
• organ builder The company or workshop who builds a permanently installed musical organ.
• organic A load-bearing frame composed of biologically grown materials.
• organic material Facade materials taken from naturally grown organisms and retaining a more or less natural appearance.
• organic pattern Different shades organized in biomorphic layout with curving or irregular lines.
• oriel A cantilevered projecting bay with windows, which increases natural light and floor space inside a building.
• oriental orthodox church A house of worship in a faith belonging to Oriental Orthodoxy.
• oriental revival Traditional East Asian architectural forms applied to modern and postmodern designs.
• ornament Used primarily for purposes of decoration or aesthetics.
• ornamental feature Design elements added to a structure for aesthetic or stylistic purposes.
• ornamental illumination Major decorative lighting on the facade other than floodlighting or logos.
• ornamental pattern A multicolor surface largely filled with regularly arranged decorative flourishes.
• ornamental rail A building summit formed by a decorative metal fence.
• orthodox synagogue A house of prayer and worship in the orthodox Jewish faith.
• orthopedics Clinical space for medical treatment of broken and misaligned bones.
• osteopathic clinic A center for treatment of patients through osteopathic therapy, involving exterior manipulations of the body.
• otolaryngology A clinic or doctor's office specializing in care of nose, ear, and throat ailments.
• outdoor dining Tables and seating available for restaurant-style eating outdoors, often on a seasonal basis.
• outdoor gear store Retail space specializing in the equipment used in wilderness activities such as camping, hiking, and mountaineering.
• outdoor observation deck A public outdoor observation area on a high floor.
• outdoor stadium A structure with raked seating around a playing field without a full roof covering.
• outdoor station Any combination of platforms, stairs, shelters, and other elements forming an open-air transit station.
• outdoor theater An open-air site or structure with a stage and audience space.
• outdoor window screens Screens or blinds which cover the exterior sides of windows.
• outerwear store Retail space specializing in coats and protective clothing for cold or rainy weather.
• outlet mall A group of stores where manufacturers sell their wares directly to consumers, usually at a discount.
• outside stairs A set of steps built over sloping ground or over a precipice, which do not belong to any other structure.
• overflow storage Space for storing miscellaneous items in order to save space in living or working areas.
• overhanging water tower A tank resting atop a thick shaft, and overhanging the shaft by less than half its radius.
• overnight guest suites Designated rooms or units in a multi-unit residential building where guests of residents can spend the night.
• owner A legal property holder or shareholder of any object.
• owner of landed property The owner of the land on which a built object is placed, independently of the object itself.
• owner's broker commission The service fee paid by a property owner to an agent for a successful sale or lease transaction.
• owner's surrogate An agent who executes a property owner's responsibilities and acts on the owner's behalf.
• owner-occupied home A residential space occupied by its owner and free of membership in a condominium association.
• owner-occupied office Business workplaces held under a single owner who also occupies the space.

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