The Collaborative International Dictionary of English v.0.48:
closedown \close"down`\ n. termination of operations; a shutdown. Syn: closure, closing, shutdown. [WordNet 1.5]WordNet (r) 3.0 (2006):
closedown n 1: termination of operations; "they regretted the closure of the day care center" [syn: closure, closedown, closing, shutdown]