Adjective tall has 4 senses
  1. tall - great in vertical dimension; high in stature; "tall people"; "tall buildings"; "tall trees"; "tall ships"
    Antonyms:
    short, chunky, dumpy, low-set, squat, squatty, stumpy, half-length, pint-size, pint-sized, runty, sawed-off, sawn-off, squab, squabby
  2. grandiloquent, magniloquent, tall - lofty in style; "he engages in so much tall talk, one never really realizes what he is saying"
    Antonym: unrhetorical (indirect, via rhetorical)
  3. tall - impressively difficult; "a tall order"
    Antonym:
    easy (indirect, via difficult)
  4. improbable, marvelous, marvellous, tall - too improbable to admit of belief; "a tall story"
    Antonyms: credible, believable (indirect, via incredible)
,
TOP