Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

sign in

verb

Definition of sign in

  • intransitive verb
    1. :  to make a record of arrival by signing a register or punching a time clock

    2. transitive verb
    3. :  to record arrival of (a person) or receipt of (an article) by signing



    1930

    First Known Use of sign in

    1930


    Learn More about sign in


    Seen and Heard

    What made you want to look up sign in? Please tell us where you read or heard it (including the quote, if possible).

    WORD OF THE DAY

    a smart aleck

    Get Word of the Day daily email!

    WORD GAMES

    Take a 3-minute break and test your skills!

    image567572573

    Which of these is a synonym of unctuous?

    prompt maudlin oily angry
    Name That Thing

    Test your visual vocabulary with our 10-question challenge!

    TAKE THE QUIZ
    SCRABBLE® Sprint

    Test Your Knowledge - and learn some interesting things along the way.

    TAKE THE QUIZ