Definitions

1. verb

to apply a thick layer of something, especially a sauce or a substance, over something

“She slathered the sunscreen on her arms before going to the beach.”

2. noun

a thick layer of something, especially a sauce or a substance, applied to something

“The slather of butter on the toast was too much.”

3. verb, transitive

to decorate or cover something with a thick layer of something, especially a sauce or a substance

“He slathered the turkey with gravy before serving it.”

4. verb, intransitive

to apply a thick layer of something to oneself, typically for protection or nourishment

“She slathered sunscreen on her skin and went for a run.”