verb: (programming, informal) To use object-oriented programming for a task.
noun: Initialism of object-oriented programming. [(programming) A programming paradigm that uses "objects" to design applications and computer programs.]
noun: (tennis) Initialism of order of play: the schedule of contests in a tennis event
adjective: (publishing) Initialism of out of print.
adjective: Abbreviation of out of pocket. [Of or pertaining to the spending of cash rather than using credit.]
adverb: (regional) Pronunciation spelling of up. [Away from the surface of the Earth or other planet; in opposite direction to the downward pull of gravity.]