"that which is lacking in sense, language or words without meaning or conveying absurd or ridiculous ideas," 1610s, from non- "not" + sense (n.); perhaps influenced by French nonsens. Since mid-20c., non-sense, with the hyphen, has been used to distinguish the meaning "that which is not sense, that which is different from sense," not implying absurdity.
"not tolerating foolishness, practical," by 1912, from the phrase to stand no nonsense "tolerate no foolishness or extravagant conduct," which is attested from 1821, originally in sporting slang.
"nonsense," 1927, said to have been coined by U.S. cartoonist Billy De Beck; perhaps a variant of horseshit "nonsense," though the latter is attested in print only from 1940s.
"nonsense, foolishness," 1922, American English slang, of unknown origin.
"silly talk, prosy nonsense," 1782, probably from twattle (1550s), of obscure origin.
nonsense word used as an expression to a baby, attested by 1888; of no etymology.
"empty talk, nonsense," 1888, from earlier sense of "puff of air" (1825), of imitative origin.