Definition of "weak" in English

adjective

1. Lacking in force (usually strength) or ability.

   • The child was too weak to move the boulder.
   • They easily guessed his weak computer password.

2. Unable to sustain a great weight, pressure, or strain.

   • a weak timber; a weak rope

3. Limp, soft.

4. Unable to withstand temptation, urgency, persuasion, etc.; easily impressed, moved, or overcome; accessible; vulnerable.

   • weak resolutions; weak virtue

5. (often with for) Having a strong, irrepressible emotional love for someone or (less often) something; sentimentally affected by such love.

6. Dilute, lacking in taste or potency.

   • We were served stale bread and weak tea.

7. (grammar) Displaying a particular kind of inflection, including:

8. (chemistry) That does not ionize completely into anions and cations in a solution.

   • a weak acid
   • a weak base
   • When we say that an acid is weak, we refer only to its degree of dissociation, not to its degree of corrosiveness; but it is true that those two traits often correlate, though.

9. (physics) One of the four fundamental forces associated with nuclear decay.

10. (slang) Bad or uncool.

    • This place is weak.

11. (mathematics, logic) Having a narrow range of logical consequences; narrowly applicable. (Often contrasted with a strong statement which implies it.)

12. Resulting from, or indicating, lack of judgment, discernment, or firmness; unwise; hence, foolish.

13. Not having power to convince; not supported by force of reason or truth; unsustained.

    • The prosecution advanced a weak case.

14. Lacking in vigour or expression.

    • a weak sentence; a weak style

15. Not prevalent or effective, or not felt to be prevalent; not potent; feeble.

16. (stock exchange) Tending towards lower prices.

    • a weak market; wheat is weak at present

17. (photography) Lacking contrast.

    • a weak negative