| Noun | 1. | groin - the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitalsregion, area - a part of an animal that has a special function or is supplied by a given artery or nerve; "in the abdominal region" loins - the region of the hips and groin and lower abdomen | |
| 2. | groin - a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing awaybarrier - a structure or object that impedes free movement | |
| Verb | 1. | groin - build with groins; "The ceiling was groined"construction, building - the act of constructing or building something; "during the construction we had to take a detour"; "his hobby was the building of boats" build, construct, make - make by combining materials and parts; "this little pig made his house out of straw"; "Some eccentric constructed an electric brassiere warmer" | |