simple past tense and past participle of cloture

(law, politics, chiefly US) 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.

To end legislative debate by this means.

plural of cloture

present participle of cloture