A signature made to confirm or endorse another.

(obsolete) To have the same value or number as. / To counteract, counterbalance or neutralize. / To compensate for.

An act of retaliation; a counterattack / Any action in opposition to a previous action.

An offer made in reply to an unacceptable offer.

To offer as a counteroffer.

In opposition to a revolution.

A person who opposes a revolution and attempts to reverse the changes made by it.

Alternative spelling of counterculture

(topology) Such that its topology has a countable base, said of a topological space.

Illicitly, against regulations, of goods kept under the serving counter in a shop to be unobtrusively passed to a customer who knows they are available for surreptitious sale (e.g. pornographic magazines in a newsagent).