conventional phrase

19 LETTERS · STARTS WITH C

conventional phrase is a valid 19-letter word worth 28 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
C3O1N1V4E1N1T1I1O1N1A1L1P3H4R1A1S1E1
3 + 1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 4 + 1 + 1 + 1 + 1 =28 PTS
DOUBLE WORD → 56TRIPLE WORD → 84
MEANING

What does conventional phrase mean?

1