delimitation

NOUN /-teɪʃən/
12 LETTERS · 5 SYLLABLES · STARTS WITH D

delimitation is a valid 12-letter word worth 15 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2E1L1I1M3I1T1A1T1I1O1N1
2 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 + 1 =15 PTS
DOUBLE WORD → 30TRIPLE WORD → 45
MEANING

What does delimitation mean?