Adjective lower case has 1 sense
  1. lowercase - relating to small (not capitalized) letters that were kept in the lower half of a compositor's type case; "lowercase letters; a and b and c etc"
    Antonyms: uppercase, capital, great, majuscule
,Noun lower case has 1 sense
  1. small letter, lower case, lower-case letter, minuscule - the characters that were once kept in bottom half of a compositor's type case
    --1 is a kind of character, grapheme, graphic symbol
    Antonyms: capital, capital letter, upper case, upper-case letter, majuscule
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