Real Dictionary

groove
countable noun: A groove is a deep line cut into a surface.

groove in American English
a long, narrow furrow or hollow cut in a surface with a tool, as the track cut in a phonograph record for the stylus to follow
to make a groove or grooves in
to react with empathy or enjoyment
noun: a long, narrow cut or indentation in a surface, as the cut in a board to receive the tongue of another board ( tongue-and-groove joint), a furrow, or a natural indentation on an organism

groove in British English
noun: a long narrow channel or furrow, esp one cut into wood by a tool