Of actions, words, titles, etc.: without worth or value; without meaning or substance; without sincerity.

Of words, tales, answers, etc.: Futile, feeble; giving no information or satisfaction; irrelevant, trifling. Obsolete.

Saying nothing to the understanding; inexpressive, meaningless; stupid, senseless. Now rare.

Incapable of being understood; unintelligible; without sense or meaning. (Chiefly in legal use.) Obsolete.

Of an action, occurrence, state of affairs, etc.: resulting from lack of sense or intelligence; stupid, foolish; often implying also lack of meaning…

Unknowing, unconscious. †Also (quot. 1579), meaningless.

Not significant, unmeaning; insignificant. (Frequently 1635–1665.)

figurative. Conveying no sense, meaningless. Obsolete.

Devoid of sense or meaning. Now archaic.

Having no significance or import; (of speech, writing, etc.) expressing nothing of significance; without meaning or sense.

Not signifying anything; meaningless.

Of inarticulate sound. Obsolete.

figurative. Hollow-sounding, empty.

Devoid of signification or meaning; meaningless: of speech, word, gestures, etc.

Not significative, not denoting by external signs.

(un-, prefix1 affix 1.)

(un-, prefix1 affix 4.)

(un-, prefix1 affix 2.)

Without meaning or signification; devoid of expression; without purpose; (Philosophy) not amenable to interpretation or logical processing.

Meaningless.

Not expressive; not expressing a meaning, feeling, character, etc.; wanting in expression.

Of sounds or words: Expressing or conveying no idea. Obsolete.

= inexpressive, adj. 2.

Having no ideas; conveying no idea, meaningless.

(un-, prefix1 affix 1).

having no tenor or purport.

without a theme, having no theme.

Unintelligible; not reasonable or judicious; nonsensical.

transferred. Having no distinct meaning.

Having no purport; meaningless, pointless.

Expressing nothing, conveying no meaning.

Devoid of content or substance.

Void of content or meaning.

Not meaningful (in various senses); meaningless, insignificant.