| OP | the doctrine that the meaning of a proposition consists of the operations involved in proving or applying it |
|---|---|
| OP | of or relating to or espousing operationalism |
| OP | in respect to operation |
| OP | financial transactions at a brokerage |
| OP | research designed to determine most efficient way to do something |
| OP | someone who can be employed as a detective to collect information |
| OP | a person secretly employed in espionage for a government |
| OP | being in force or having or exerting force |
| OP | (of e.g. a machine) performing or capable of performing |
| OP | relating to or requiring or amenable to treatment by surgery especially as opposed to medicine |
| OP | effective |
| OP | of or relating to a surgical operation |