The definition of groovy is slang to describe something that is very good, fun, or nice looking.
Very good; better than expected but not as good as could be.
Unsparing, harsh, or strict, as in treatment of others:
Intensely eager; intense; ardent
(Slang) Excellent, good, funny, etc.
(Slang) Excellent, wonderful, delightful, etc.
Having a strong desire; craving
Temporarily or apparently deranged by violent sensations, emotions, or ideas:
Find another word for keener. In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for keener, like: niftier, groovier, dandier, severer, fiercer, hotter, dreamier, thirstier, crazier, madder and better.