caulk

Short definition from Wiktionary

Noun

1. 1
   Caulking.
2. 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. 3
   Alternative form of calk (“pointed projection on a horseshoe”).
4. 4
   A short sleep; a nap.

Verb

1. 1
   To drive oakum into the seams of a ship's wooden deck or hull to make it watertight.
2. 2
   To apply caulking to joints, cracks, or a juncture of different materials.
3. 3
   To copulate.
4. 4
   To take a short sleep; to nap.

Proper noun

1. 1
   A surname.