Simple Definition of weak
: having little physical power or ability : not strong
: having little power or force
: likely to break or stop working properly : not able to handle weight, pressure, or strain
Full Definition of weak
1 : lacking strength: as a : deficient in physical vigor : feeble, debilitated b : not able to sustain or exert much weight, pressure, or strain c : not able to resist external force or withstand attack d : easily upset or nauseated <a weak stomach>
2 a : mentally or intellectually deficient b : not firmly decided : vacillating c : resulting from or indicating lack of judgment or discernment d : not able to withstand temptation or persuasion <the spirit is willing but the flesh is weak>
3 : not factually grounded or logically presented <a weak argument>
4 a : not able to function properly <weak eyes> b (1) : lacking skill or proficiency <tutoring for weaker students> (2) : indicative of a lack of skill or aptitude <history was my weakest subject> c : wanting in vigor of expression or effect <a weak translation of the poem>
5 a : deficient in the usual or required ingredients : dilute <weak coffee> b : lacking normal intensity or potency <a weak radio signal> <a weak strain of virus>
7 : of, relating to, or constituting a verb or verb conjugation that in English forms the past tense and past participle by adding the suffix -ed or -d or -t
8 a : bearing the minimal degree of stress occurring in the language <a weak syllable> b : having little or no stress and obscured vowel sound <'d in he'd is the weak form of would>
Examples of weak in a sentence
He has a weak throwing arm.
The illness left her too weak to stand up.
The child was born with weak lungs.
The batter hit a weak ground ball.
She uttered her reply in a weak voice.
The door's hinge is weak.
Origin of weak
Middle English weike, from Old Norse veikr; akin to Old English wīcan to yield, Greek eikein to give way, Sanskrit vijate he speeds, flees
First Known Use: 14th century
Synonym Discussion of weak
WEAK Defined for Kids
Definition of weak for Students
1 : lacking strength of body, mind, or spirit <a weak smile> <a weak patient>
2 : not able to stand much strain or force <a weak rope>
3 : easily overcome <a weak argument>
4 : not able to function well <a weak heart>
5 : not rich in some usual or important element <weak tea>
6 : lacking experience or skill <He's a good reader, but is weak in math.>
7 : not loud or forceful <a weak voice>
8 : relating to or being the lightest of three levels of stress in pronunciation
Seen and Heard
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