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

The Dodgers are hopeful left-hander Blake Snell, who came out of Wednesday’s game after an inning because of groin tightness, will be healthy enough for one more regular-season start. — Los Angeles Times, 19 Sep. 2026

Low tide exposed the concrete and rock infrastructure — known as groins and jetties — used to shore up the beach a half-century ago. — Adam Van Brimmer, AJC.com, 19 Sep. 2026

Hall injured his groin midway through training camp in August. — Antwan Staley, New York Daily News, 18 Sep. 2026

For the 49ers, kicker Eddy Pineiro (illness) and running back Kaelon Black (groin) are questionable. — David Furones, Sun Sentinel, 18 Sep. 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
• quoin
• adjoin
• benzoin
• bitcoin
• conjoin
• enjoin

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