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sigma hyperon
sigmoid
sigmoid colon
sigmoid flexure
sigmoidoscope
sign
sign away
sign convention
sign in
sign language
sign manual
sign of the cross
sign off
sign-off
sign on
sign out
sign-out
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sign in

sign in


intransitive verb 
Definition:
 
write name: to write a signature in a register, usually as a way of recording presence or attendance

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