sign in/up

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Senior Member
Czech Republic; Czech
What is the difference between the phrasal verbs "sign up" and "sign in". (Is there a difference (in the usage) at all?)
  • vachecow

    Senior Member
    USA English
    From the dictionary:
    sign in: to record or authorize one's arrival (or departure) by signing a register.

    sign up: to enlist, as in an organization or group; to register or subscribe
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