Definitions

1. verb

to take off or remove a lap or wrapping from something, such as an animal or an object

“She carefully unlap the sleeping kitten to give it a bath.”

2. verb

to untie or remove the reins from an animal, especially a horse

“The rider unlap his horse before letting it graze in the field.”

3. verb

to remove the lap of a sail from the mast

“The sailor unlap the sail to fix the torn fabric.”