Adjective nonsense has 1 sense
  1. nonsense, nonsensical - having no intelligible meaning; "nonsense syllables"; "a nonsensical jumble of words"
    Antonym: meaningful (indirect, via meaningless)
,Noun nonsense has 2 senses
  1. nonsense, bunk, nonsensicality, meaninglessness, hokum - a message that seems to convey no meaning
    --1 is a kind of message, content, subject matter, substance
    --1 has particulars:
     absurdity, absurdness, ridiculousness; amphigory, nonsense verse; balderdash, fiddle-faddle, piffle; buzzword, cant; cobblers; crock; fa la, fal la; gibberish, gibber; incoherence, incoherency, unintelligibility; jabberwocky; mummery, flummery; palaver, hot air, empty words, empty talk, rhetoric; rigmarole, rigamarole; shmegegge, schmegegge; stuff, stuff and nonsense, hooey, poppycock; baloney, boloney, bilgewater, bosh, drool, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle
  2. falderal, folderol, frills, gimcrackery, gimcracks, nonsense, trumpery - ornamental objects of no great value
    --2 is a kind of decoration, ornament, ornamentation