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WordNet-Online 
 Definitions from WordNet | ||||
| Definitions from the WebTerm: opt outPart of Speech: Verb Sense 1: To choose not to participate in something or to withdraw from a commitment or agreement. Usage: 
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| opsonisation opsonization opsonize opssesed opssum opstacle opt-ed opt-in opt-out opt opt in opt out opt to optaion optation optative optative mood 
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