intransitive verb
Definition: To fill in gaps or cracks with a material to make something watertight or airtight.
Example: He decided to caulk the bathtub to prevent any leaks.
noun
Definition: A material used to fill gaps or seal joints, often in construction or repair work, to prevent water or air from passing through.
Example: The contractor applied caulk around the windows to keep out drafts.
transitive verb
Definition: To fill or seal gaps in a surface to prevent water or air from passing through, often using a special material.
Example: The workers caulked the windows to keep the cold air out during winter.