Keyword Analysis & Research: what does def mean in python

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does def mean in python	0.25	1	4356	73	28
what	1.8	0.9	7312	67	4
does	1.25	0.8	3970	20	4
def	0.44	0.2	6266	83	3
mean	0.03	0.7	1492	71	4
in	1.87	1	5643	22	2
python	0.05	0.9	3409	90	6

Keyword	CPC	PCC	Volume	Score
what does def mean in python	1.2	0.3	5434	47