A simpleton is an idiot — a person without much common sense or intelligence.

This is one of many words — such as moron, dummy, and dimwit — that insult a person's intelligence. A simpleton is the opposite of a genius. However, the word simple implies more than lack of intelligence; it suggests being innocent or naive too. So a simpleton could be considered a hillbilly or yokel as well as a dullard or dunce.

Definitions of simpleton

n a person lacking intelligence or common sense

a buffoon in modern pantomimes; the butt of jokes
show 32 types...
hide 32 types...
a flighty scatterbrained simpleton
dimwit, doofus, half-wit, nitwit
a stupid incompetent person
a silly empty-headed person
boob, booby, dope, dumbbell, dummy, pinhead
an ignorant or foolish person
fool, muggins, sap, saphead, tomfool
a person who lacks good judgment
changeling, cretin, half-wit, idiot, imbecile, moron, retard
a person of subnormal intelligence
idiot savant
person who is mentally retarded in general but who displays remarkable aptitude in some limited field (usually involving memory)
nebbech, nebbish
(Yiddish) a timid unfortunate simpleton
nincompoop, ninny, poop
a stupid foolish person
forgetful person, scatterbrain
a flighty and disorganized person
schlemiel, shlemiel
(Yiddish) a dolt who is a habitual bungler
schlep, schlepper, shlep, shlepper
(Yiddish) an awkward and stupid person
schnook, shnook
(Yiddish) a gullible simpleton more to be pitied than despised
a timid defenseless simpleton who is readily preyed upon
space cadet
someone who seems unable to respond appropriately to reality (as if under the influence of some narcotic drug)
lame, square
someone who doesn't understand what is going on
dolt, dullard, pillock, poor fish, pudden-head, pudding head, stupe, stupid, stupid person
a person who is not very bright
a person of less than normal intelligence
twerp, twirp, twit
someone who is regarded as contemptible
a pompous fool
a stupid person who is easy to take advantage of
buffoon, clown
a rude or vulgar fool
blockhead, bonehead, dumbass, dunce, dunderhead, hammerhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull
a stupid person; these words are used to express a low opinion of someone's intelligence
flibbertigibbet, foolish woman
a female fool
a stupid despised man
bozo, cuckoo, fathead, goof, goofball, goose, jackass, twat, zany
a man who is a stupid incompetent fool
(Yiddish) a clumsy dolt
meshuggeneh, meshuggener
(Yiddish) a crazy fool
a person suffering from Down syndrome (no longer used technically in this sense)
a learned fool
(Yiddish) a fool; an idiot
a silly and inept person; someone who is regarded as stupid
Type of:
individual, mortal, person, somebody, someone, soul
a human being

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, can put you on the path to systematic vocabulary improvement.