'Strengthen' definitions:

Definition of 'strengthen'

From: WordNet
verb
Make strong or stronger; "This exercise will strengthen your upper body"; "strengthen the relations between the two countries" [syn: strengthen, beef up, fortify] [ant: weaken]
verb
Gain strength; "His body strengthened" [ant: weaken]
verb
Give a healthy elasticity to; "Let's tone our muscles" [syn: tone, tone up, strengthen]

Definition of 'Strengthen'

From: GCIDE
  • Strengthen \Strength"en\, v. t. [imp. & p. p. Strengthened; p. pr. & vb. n. Strengthening.]
  • 1. To make strong or stronger; to add strength to; as, to strengthen a limb, a bridge, an army; to strengthen an obligation; to strengthen authority. [1913 Webster]
  • Let noble Warwick, Cobham, and the rest, . . . With powerful policy strengthen themselves. --Shak. [1913 Webster]
  • 2. To animate; to encourage; to fix in resolution. [1913 Webster]
  • Charge Joshua, and encourage him, and strengthen him. --Deut. iii. 28. [1913 Webster]
  • Syn: To invigorate; confirm; establish; fortify; animate; encourage. [1913 Webster]

Definition of 'Strengthen'

From: GCIDE
  • Strengthen \Strength"en\, v. i. To grow strong or stronger. [1913 Webster]
  • The young disease, that must subdue at length, Grows with his growth, and strengthens with his strength. --Pope. [1913 Webster]