1. Verb:
* To seal cracks or gaps: This is the most common meaning. Caulk is used to fill in gaps between materials like wood, metal, and concrete, to prevent leaks and drafts. This is usually done with a sealant or a putty-like substance.
2. Noun:
* The sealant or putty itself: "The plumber used caulk to seal the leaky pipe."
* A type of boat: A small, open boat with a high, pointed bow and stern. This is a more archaic meaning.
Here are some examples:
* "We need to caulk the windows before winter." (verb - sealing gaps)
* "The carpenter used a caulking gun to apply the caulk." (noun - sealant)
* "They set sail in a small caulk." (noun - type of boat)
The meaning of "caulk" is usually clear from the context of the sentence.