The meaning of STRENGTHEN is to make stronger, more forceful, more effective, etc.. How to use strengthen in a sentence.

Define strengthen. strengthen synonyms, strengthen pronunciation, strengthen translation, English dictionary definition of strengthen. v. strength·ened , strength·en·ing , strength·ens v. …

STRENGTHEN definition: 1. to make something stronger or more effective, or to become stronger or more effective: 2. to…. Learn more.

If something strengthens an object or structure, it makes it able to be treated roughly or able to support heavy weights, without being damaged or destroyed. The builders will have to …

STRENGTHEN definition: to make stronger; give strength to. See examples of strengthen used in a sentence.

strength•en /ˈstrɛŋkθən, ˈstrɛn-/ v. to (cause to) grow stronger; give strength (to): [no object] The hurricane strengthened overnight. [~ + object] We'll have to strengthen our defenses.

Nov 24, 2025 · strengthen (third-person singular simple present strengthens, present participle strengthening, simple past and past participle strengthened) (transitive) To make strong or …