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

Younger brother Seth Curry is out at least a week with a left groin strain and veteran forward Al Horford has a left calf strain that will also sideline him at least a week. —CBS News, 16 Mar. 2026

Hamstring, groin, ankle and foot injuries have also cost him games. —Cam Inman, Mercury News, 16 Mar. 2026

Fields didn’t start another game the rest of the season, even after Taylor suffered a groin injury in December. —Antwan Staley, New York Daily News, 16 Mar. 2026

Herro returned after missing the previous two games with left quad soreness and Powell returned after missing the previous seven games with a right groin strain. —Anthony Chiang, Miami Herald, 15 Mar. 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