I. noun Etymology: 1or Date: circa 1956 a logical operator that requires either of two inputs to be present or conditions to be met for an output to be made or a statement to be executed , II. abbreviation operating room, operational research; operations research, Oregon, owner's risk, own recognizance
OR
Meaning of OR in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012