'rock-ribbed' definitions:

Definition of 'rock-ribbed'

(from WordNet)
adjective
Abounding in or bordered by rocky cliffs or scarps; "the rock-ribbed coast of Maine" [syn: rock-ribbed, rockbound]
adjective
Tradition-bound and obstinately opinionated; "an inflexible (or die-hard) conservative"; "rock-ribbed republican" [syn: die-hard(a), rock-ribbed]