bluelinerEtymologyFrom blue + liner, after blue line in hockey.blueliner means A defenceman Lexicurio rates it Sui generis — a strength score of 89 out of 100.nounA defenceman“On Saturday, hard-luck blueliner Mike Van Ryn was blasted into the end boards by Montreal forward Max Pacioretty and isn't expected to be available for a week or perhaps longer with a lower body injury.”