cloture

Short definition from Wiktionary

Noun

1. 1
   In legislative assemblies that permit unlimited debate (that is, a filibuster): a motion, procedure or rule by which debate is ended so that a vote may be taken on the matter. For example, in the United States Senate, a three-fifths majority vote of the body is required to invoke cloture and terminate debate.

Verb

1. 1
   To end legislative debate by this means.