Able to be operated or used / Able to be put into operation; practicable / Able to be treated by surgery

The practice of taking advantage of any situations or people to achieve an end, often with no regard for principles or consequences.

The characteristic of being open-minded.

In an operatic manner.

In an open-minded manner.

plural of binary operation

(poker) Four cards to a straight where cards of two different ranks could complete a straight. (E.g. 4-5-6-7)

(arithmetic, computing) Any one of the four basic operations in arithmetic: addition, subtraction, multiplication or division; any one of said operations as implemented on a computer.

An electronic device used to open a garage door remotely.

(algebra) An operation taking two operands.