The Collaborative International Dictionary of English v.0.48:
Cloture \Cl[^o]`ture"\, n. [F.] (Parliamentary Practice) See Closure, 5. [1913 Webster]WordNet (r) 3.0 (2006):
cloture n 1: a rule for limiting or ending debate in a deliberative body [syn: closure, cloture, gag rule, gag law] v 1: terminate debate by calling for a vote; "debate was closured"; "cloture the discussion" [syn: closure, cloture]