Definition of "caulk"

caulk

/kɔːk/

noun
countable and uncountable, plural caulks
1. Caulking.
2. A composition of vehicle and pigment used at ambient temperatures for filling/sealing joints or junctures, that remains elastic for an extended period of time after application.
3. Alternative form of calk (“pointed projection on a horseshoe”)
verb
third-person singular simple present caulks, present participle caulking, simple past and past participle caulked
1. (nautical) To drive oakum into the seams of a ship's wooden deck or hull to make it watertight.
  Quotations
  [W]e might be disturbed during the night by an order being given to "go about," and by hearing in the quiet hours of the morning the familiar inquiry of "How's her head?" Mine often ached with the din of the men caulking all day long!
  1887, Harriet W. Daly, Digging, Squatting, and Pioneering Life in the Northern Territory of South Australia, page 112
2. To apply caulking to joints, cracks, or a juncture of different materials.
3. (slang) To copulate.