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signalize
signally
signalman
signalment
signatory
signature
signature file
signature guarantee
signature loan
signature tune
signboard
signed
signed-ranks test
signet
signet ring
significance
significant
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transitive and intransitive verb 
Definition:
 
1. agree to participate: to agree to participate in something, or get somebody to agree to participate in something, especially by way of a signature

2. enlist: to enlist for military service, or enlist somebody for military service

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