real number

NOUN
11 LETTERS · 3 SYLLABLES · STARTS WITH R

real number is a valid 11-letter word worth 14 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
R1E1A1L1N1U1M3B3E1R1
1 + 1 + 1 + 1 + 0 + 1 + 1 + 3 + 3 + 1 + 1 =14 PTS
DOUBLE WORD → 28TRIPLE WORD → 42
MEANING

What does real number mean?