(US) To make a telephone call in which the cost of the call is paid by the person receiving the call.

(programming) To reclaim resources which are no longer in use; to run a garbage collector.

(Canada, US) A service, generally run by local government, for transporting household garbage to the appropriate facility.

(grammar) A noun which, though singular, refers to a group of things or animals. Examples: a school of fish, a pride of lions.

Any organisation which manages or administers copyright or rights related to copyright as its sole purpose or as one of its main purposes

A collection of works of art housed together.

The hobby of collecting and displaying postage stamps and related items. / (figuratively, usually derogatory) Collection of items or information of no intrinsic value.

(idiomatic) To remain untouched and unused for a long period of time.

plural of collective noun

The concept of maintaining peace among all nations or members of a group by making the security concerns of one member important to all members.