AskDefine | Define strengthen

Dictionary Definition



1 make strong or stronger; "This exercise will strengthen your upper body"; "strenghten the relations between the two countries" [syn: beef up, fortify] [ant: weaken]
2 gain strength; "His body strengthened" [ant: weaken]
3 give a healthy elasticity to; "Let's tone our muscles" [syn: tone, tone up]

User Contributed Dictionary





  1. To make strong or stronger; to add strength to; to increase the strenght of; as, to strengthen a limb, a bridge, an army; to strengthen an obligation; to strengthen authority; to fortify; to reinforce.
  2. To animate; to give moral strength; to encourage; to fix in resolution; to hearten.
  3. To augment; to improve; to intensify.
  4. To grow strong or stronger.


  • 1851: Anonymous, Arthur Hamilton, and His Dog
    A little hardship, and a little struggling with the rougher elements of life, will perchance but strengthen and increase his courage, and prepare him for the conflicts and struggles of after years.


to make strong or stronger
to animate
to augment
to grow strong or stronger


Synonyms, Antonyms and Related Words

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