WordReference Random House Unabridged Dictionary of American English © 2020
101  (wunō wun),USA pronunciation adj. 
  • Informal Termscomprising the introductory material in or as if in a course of study (used postpositively): Economics 101;
    Life 101;
    It's Jungle 101 on a trip up the Amazon.
    • 1985–90

    '101' also found in these entries:
    Advertisements
    Advertisements

    Report an inappropriate ad.