1541, "mentally slow," from M.Fr. stupide, from L. stupidus "amazed, confounded," lit. "struck senseless," from stupere "be stunned, amazed, confounded," from PIE *(s)tupe- "hit," from base *(s)teu- (see steep (adj.)). Native words for this idea include negative compounds with words for "wise" (cf. O.E. unwis, unsnotor, ungleaw), also dol (from root of Ger. toll "mad," related to Gk. tholeros "muddy, turbid"), and dysig (see dizzy). Stupid retained its association with stupor and its overtones of "stunned by surprise, grief, etc." into mid-18c. The difference between stupid and the less opprobrious foolish roughly parallels that of Ger. töricht vs. dumm but does not exist in most European languages.
lacking or marked by lack of intellectual acuity [ant: smart]
2.
in a state of mental numbness especially as resulting from shock; "he had a dazed expression on his face"; "lay semiconscious, stunned (or stupefied) by the blow"; "was stupid from fatigue" [syn: dazed]
3.
lacking intelligence; "a dull job with lazy and unintelligent co-workers" [syn: unintelligent] [ant: intelligent]
noun
1.
a person who is not very bright; "The economy, stupid!"
A*cute"\, a. [L. acutus, p. p. of acuere to sharpen, fr. a root ak to be sharp. Cf. Ague, Cute, Edge.]1. Sharp at the end; ending in a sharp point; pointed; -- opposed to blunt or obtuse; as, an acute angle; an acute leaf. 2. Having nice discernment; perceiving or using minute distinctions; penetrating; clever; shrewd; -- opposed to dull or stupid; as, an acute observer; acute remarks, or reasoning. 3. Having nice or quick sensibility; susceptible to slight impressions; acting keenly on the senses; sharp; keen; intense; as, a man of acute eyesight, hearing, or feeling; acute pain or pleasure. 4. High, or shrill, in respect to some other sound; -- opposed to grave or low; as, an acute tone or accent. 5. (Med.) Attended with symptoms of some degree of severity, and coming speedily to a crisis; -- opposed to chronic; as, an acute disease. Acute angle (Geom.), an angle less than a right angle. Syn: Subtile; ingenious; sharp; keen; penetrating; sagacious; sharp-witted; shrewd; discerning; discriminating. See Subtile.
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