1. wanting in physical strength

- a weak pillar

Similar word(s): delicate, powerless, anaemic, anemic, adynamic, asthenic, debilitated, enervated, faint, feeble, lame, flimsy, insubstantial, gutless, spineless, pale, pallid, sick, wan, puny, vulnerable, weakened, limp, wilted, tender, untoughened

2. overly diluted; thin and insipid

- weak tea

Similar word(s): dilute, diluted, washy, watery

3. (used of vowels or syllables) pronounced with little or no stress

- a weak stress on the second syllable

Similar word(s): unstressed, light, unaccented

4. wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings

Similar word(s): human, fallible, frail, imperfect

5. tending downward in price

- a weak market for oil stocks

Similar word(s): down

6. deficient or lacking in some skill

- he's weak in spelling

Similar word(s): unskilled

7. lacking bodily or muscular strength or vitality

Similar word(s): frail, debile, decrepit, feeble, infirm, rickety, sapless, weakly

8. (used of verbs) having standard (or regular) inflection

Similar word(s): regular

9. not having authority, political strength, or governing power

- a weak president

Similar word(s): powerless

10. deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc

- weak colors

- a weak pulse

Similar word(s): perceptible, faint

11. likely to fail under stress or pressure

- the weak link in the chain

Similar word(s): fallible

12. deficient in intelligence or mental power

- a weak mind

Similar word(s): stupid

Sentences with weak as an adjective:

- The child was too weak to move the boulder.

- They easily guessed his weak computer password.

- a weak timber; a weak rope

- weak resolutions; weak virtue

- We were served stale bread and weak tea.

- a weak acid;

- This place is weak.

- The prosecution advanced a weak case.

- a weak sentence; a weak style

- a weak market; wheat is weak at present

- a weak negative