Definition of groovier:
(adj) :
(dated, slang) Cool, neat, interesting.
(adj) :
(slang) Reminiscent of 1960s counterculture; hippie, psychedelic.
(adj) :
(music) Melodious, danceable; particularly of a riff or bassline.
(n) :
(dated, slang) A trendy and fashionable person.
(adj) :
Of, pertaining to, or having grooves.
(adj) :
(dated) Set in one's ways.