Definitions

1. adjective

most full of or characterized by plums; having the most plums, plum-like quality, or a reddish-purple color.

“The plummiest jam is made from a secret family recipe.”

2. adverb

in the most full of or characterized by plums way; having the most plums, plum-like quality, or a reddish-purple color.

“The plummiest trees grew in that particular orchard.”