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

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.

(algebra, computing) A symbol representing unary operation; an operator taking one operand.