weak Definition

weak
adj weaker, weakest

1. Lacking physical strength.

Thesaurus: debilitated, sickly, frail, delicate, enervated; Antonym: strong, healthy, robust.
2. Lacking in moral or mental force.
3. Not able to support or sustain a great weight.
4. Not functioning effectively.
5. Liable to give way.
6. Lacking power.
7. commerce.
Dropping in value.
8. Too easily influenced or led by others.
9. Yielding too easily to temptation.
10. Lacking full flavour.
11. Said of an argument: unsound or unconvincing; inconclusive.
12. Faint.

Example: a weak signal
Thesaurus: thin, low, soft, indistinct, feeble, faint, dim, pale.
13. Half-hearted.

Example: a weak smile
14. phonetics.
Said of a sound or accent: having little force.
15. Said of a verse line: having the accent on a normally unstressed syllable.
16. Defective in some respect; having insufficient of something.

Form: weak on something (sometimes)
Form: weak in something
17. grammar.
Said of a verb: inflected by the addition of a regular suffix rather than by a change in the main vowel, eg talk, talked. Compare strong sense 13.

Derivative: weakly
adverb

Etymology: 13c: from Norse veikr.