Glossary · Nouns · O
L1 — paginated flat list. Pick a POS, pick a letter.
TermTypeDefinitionClassificationsUpdated
Obscurenessnounthe state of being indistinct or indefinite for lack of adequate illuminationverified
Observationnounthe careful, close examination of an object, process, or other phenomenon for the purpose of collecting data about it or drawing conclusions.Data
Observed FirenounMWEfire for which the point of impact (the burst) can be seen by an obserververified
Obsessionnounan irrational motive for performing trivial or repetitive actions, even against your willverified
Obsessive-Compulsive DisordernounMWEan anxiety disorder characterized by recurrent and persistent thoughts and feelings and repetitive, ritualized behaviorsverified
Obsessive-Compulsive PersonalitynounMWEpersonality characterized by a strong need to repeat certain acts or ritualsverified
Obsidiannounacid or granitic glass formed by the rapid cooling of lava without crystallizationverified
Obstaclenounan obstruction that stands in the way and must be removed, surmounted or circumventedverified
Obstetrical ToadnounMWEEuropean toad whose male carries the fertilized eggs wrapped around its hind legs until they hatchverified
Obstructionnounsomething immaterial that stands in the way and must be circumvented or surmountedverified
Obstruction of JusticenounMWEimpeding those who seek justice in a court (as by trying to influence or intimidate any juror or witness or officer of the court)verified
Obstruentnouna consonant that is produced with a partial or complete blockage of the airflow from the lungs through the nose or mouthverified
Obturatornouna prosthesis used to close an opening (as to close an opening of the hard palate in cases of cleft palate)verified
Obturator VeinnounMWEa vein formed by the union of tributaries that drain the hip joints and thigh musclesverified
Obviationnounthe act of preventing something by anticipating and disposing of it effectivelyverified
Occam's RazornounMWEthe problem solving principle which states that among competing theories, one ought to choose the theory that relies on the fewest assumptions. verified
Occidentalismnounthe quality or customs or mannerisms characteristic of Western civilizationsverified
Occipital CortexnounMWEthat part of the cerebral cortex in either hemisphere of the brain lying in the back of the headverified
Occipital GyrusnounMWEany of the convolutions of the outer surface of the occipital lobe of the cerebrumverified
Occipital LobenounMWEthat part of the cerebral cortex in either hemisphere of the brain lying in the back of the headverified
Occluded FrontnounMWE(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloftverified
Occlusionnoun(meteorology) a composite front when colder air surrounds a mass of warm air and forces it aloftverified
Occultismnouna belief in supernatural powers and the possibility of bringing them under human controlverified
Occupancy RatenounMWEthe percentage of all rental units (as in hotels) are occupied or rented at a given timeverified
Occupantnounsomeone who lives at a particular place for a prolonged period or who was born thereverified
Occupational DiseasenounMWEdisease or disability resulting from conditions of employment (usually from long exposure to a noxious substance or from continuous repetition of certain acts)verified
Occupational Safety and Health ActnounMWEa law passed by the United States Congress that created the Occupational Safety and Health Administration to prevent employees from being injured or contracting diseases in the course of their employmentverified
Occupational TherapynounMWEtherapy based on engagement in meaningful activities of daily life, especially to enable or encourage participation in such activities in spite of impairments or limitations in physical or mental functionsverified
Occupiernounsomeone who lives at a particular place for a prolonged period or who was born thereverified
Ocean LinernounMWEa large commercial ship (especially one that carries passengers on a regular schedule)verified