groin

1 of 2

noun

ˈgrȯin 

1

: the fold or depression marking the juncture of the lower abdomen and the inner part of the thigh

also : the region of this line

2

a

: the projecting curved line along which two intersecting vaults meet

b

: a rib that covers this edge

3

: a rigid structure built out from a shore to protect the shore from erosion, to trap sand, or to direct a current for scouring a channel

Illustration of groin

• groin 2a

groin

2 of 2

verb

groined; groining; groins

transitive verb

: to build or equip with groins

Examples of groin in a Sentence

Recent Examples on the Web

Noun

As for the remainder of the Heat injury report, Norman Powell (groin) and Nikola Jovic (back) remain out, with Keshad Johnson, Vlad Goldin and Trevor Keels now on G League assignment. —Ira Winderman, Sun Sentinel, 2 Mar. 2026

Cleveland's Donovan Mitchell was sidelined for a third straight game due to a groin injury. —CBS News, 2 Mar. 2026

Cleveland's Donovan Mitchell was sidelined for a third straight game due to a groin injury. —ABC News, 1 Mar. 2026

Devers, 29, dealt with back and groin ailments last season but still didn’t miss a game with the Red Sox or after he was traded to the Giants. —Justice Delos Santos, Mercury News, 28 Feb. 2026

Word History

Etymology

Noun

alteration of Middle English grynde, from Old English, abyss; akin to Old English grund ground

First Known Use

Noun

circa 1532, in the meaning defined at sense 1

Verb

circa 1816, in the meaning defined above

Rhymes for groin

• coin
• coyne
• join
• koine
• loin
• moine
• moyen
• quoin
• adjoin
• benzoin
• bitcoin
• conjoin

Kids Definition

groin

1 of 2 noun

ˈgrȯin 

1

: the junction of the lower abdomen and the inner part of the thigh or the part of the body around this junction

2

: the curved line or rib on a ceiling along which two vaults meet

groin

2 of 2 verb

: to build or equip with groins

Medical Definition

groin

noun

ˈgrȯin 

: the fold or depression marking the juncture of the lower abdomen and the inner part of the thigh

also : the region of this line