Definitions

1. noun

a small yellow flower with five petals, especially the one that grows in fields and meadows

“The field was full of buttercups on this sunny day.”

2. noun

a type of daisy, Ranunculus acris

“The botanical garden had an exhibit on various types of buttercups.”

3. verb

to make something smooth and shiny, especially by applying butter or another substance

“She buttercupped the leather boots to give them a nice finish.”