Definition of "caulking" [caulk•ing]

• A usually impermeable substance used for caulking. Also called caulking compound. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "WILLIS: We talked about caulking, which is something you definitely want to do."
• "The scores are estimates unless a homeowner inputs more detailed information, which allows Hohm to provide customized tips for conserving energy such as caulking windows or adding insulation."
• "The program would likely cover weatherization efforts such as caulking, duct sealing, and insulating, as well as heating and cooling equipment."