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What is the meaning of life?

To quote Merriam-Webster:

Main Entry: 1life
Function: noun
Inflected Form(s): plural lives /'lIvz/
Etymology: Middle English lif, from Old English lif; akin to Old English libban to live -- more at LIVE

1 a : the quality that distinguishes a vital and functional being from a dead body b : a principle or force that is considered to underlie the distinctive quality of animate beings -- compare VITALISM 1 c : an organismic state characterized by capacity for metabolism, growth, reaction to stimuli, and reproduction.
2 a : the sequence of physical and mental experiences that make up the existence of an individual b : one or more aspects of the process of living
3 : BIOGRAPHY 1
4 : spiritual existence transcending physical death
5 a : the period from birth to death b : a specific phase of earthly existence c : the period from an event until death d : a sentence of imprisonment for the remainder of a convict's life
6 : a way or manner of living
7 : LIVELIHOOD
8 : a vital or living being; specifically : PERSON
9 : an animating and shaping force or principle
10 : SPIRIT, ANIMATION
11 : the form or pattern of something existing in reality
12 : the period of duration, usefulness, or popularity of something
13 : the period of existence (as of a subatomic particle) -- compare HALF-LIFE
14 : a property (as resilience or elasticity) of an inanimate substance or object resembling the animate quality of a living being
15 : living beings (as of a particular kind or environment)
16 a : human activities b : animate activity and movement c : the activities of a given sphere, area, or time
17 : one providing interest and vigor
18 : an opportunity for continued viability
19 : capitalized, Christian Science : GOD 1b
20 : something resembling animate life

It's not in there.

so-

there you have it.