Any form of communication between two parties, both of whom can send and receive messages.

(US, electricity) A type of light switch that can be arranged in pairs to control lights from two locations, as at either end of a stairway or long hallway; a double-throw switch. (Britain): two-way switch.

(idiomatic) Driven by habit; inclined or determined to continue according to one's custom or established preferences.

(idiomatic) At a time in the distant past.

(idiomatic) At a time in the distant past.

(idiomatic, colloquial) Thoroughly, completely, in every way imaginable.

(idiomatic, of a person) To obtain the circumstances one wishes for; to do what one wishes to do, or to have others do what one wishes them to do. / (idiomatic) To achieve a desired or natural result.

(idiomatic) Not in the direct route that one would normally use.

Used to order someone to give clear passage.

The same but with the things or people mentioned in reverse order.