last but not least

ADVERB
18 LETTERS · STARTS WITH L

last but not least is a valid 18-letter word worth 17 points in Scrabble and 22 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
L1A1S1T1B3U1T1N1O1T1L1E1A1S1T1
1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 0 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 =17 PTS
DOUBLE WORD → 34TRIPLE WORD → 51
MEANING

What does last but not least mean?

ADVERB · 1 SENSE
1

In addition to all the foregoing.