groin Meaning, Definition & Usage

  1. noun 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 genitals
  2. noun a curved edge formed by two intersecting vaults
  3. noun a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
    groyne; bulwark; jetty; breakwater; mole; seawall.
  4. verb build with groins
    • The ceiling was groined


Groin noun
F. groin, fr. grogner to grunt, L. grunnire.
  1. The snout of a swine. Obs. Chaucer.
Groin intransitive verb
F. grogner to grunt, grumble.
  1. To grunt to growl; to snarl; to murmur. Obs. Chaucer.
    Bears that groined coatinually. Spenser.
Groin noun
Icel. grein distinction, division, branch; akin to Sw. gren, branch, space between the legs, Icel. greina to distinguish, divide, Sw. grena to branch, straddle. Cf. Grain a branch.
  1. (Anat.) The line between the lower part of the abdomen and the thigh, or the region of this line; the inguen.
  2. (Arch.) The projecting solid angle formed by the meeting of two vaults, growing more obtuse as it approaches the summit.
  3. (Math.) The surface formed by two such vaults.
  4. A frame of woodwork across a beach to accumulate and retain shingle. Eng. Weale.
Groin transitive verb
imperfect & past participle Groined ; present participle & verbal noun Groining
  1. (Arch.) To fashion into groins; to build with groins.
    The hand that rounded Peter's dome, And groined the aisles of Christian Rome, Wrought in a sad sincerity. Emerson.

Webster 1913