'U-shaped' definitions:

Definition of 'U-shaped'

(from WordNet)
adjective
Shaped in the form of the letter U

Definition of 'U-shaped'

From: GCIDE
  • U-shaped \U"-shaped`\, a. Having the form of the letter U; specif. (Phys. Geog.), of valleys, resembling a broad U in cross profile. [Webster 1913 Suppl.]