Mop/mɑːp/ Definition 1 of 3Pro Tip 1/3Cleaning Tool Think of a mop as a special broom for wet cleaning, not sweeping. After spilling juice, I grabbed the mop. Pro Tip 2/3Floor Specific Mops are mostly used for floors, unlike sponges for counters. Let’s mop up this sticky mess on the floor. Pro Tip 3/3Wet Usage Mops require water or cleaning fluid to be effective. I need to wet the mop before cleaning.