Webster's English Dictionary

Enter the word to look up:

groin

1. groin \'gro.in\ n [alter. of ME grynde, fr. OE, abyss; akin to OE grund 
   ground] 1: the fold or depression marking the juncture of the lower abdomen 
   and thi gh; also : the region of this line 2a: the projecting curved line 
   along which two intersecting vaults meet  2b: a rib that covers this edge 
2. groin vt : to build or equip with groins