2 common meanings:

1) is in formatting documents where the words are stretched or squashed evenly to fit between margins.

Justify text on a page

the other meaning is

2) Justify เรื่องอะไร reuuangF aL raiM

To give evidence as to why something happens.

to show (an act, claim, statement, etc.) to be just or right: The end does not always justify the means.

to defend or uphold as warranted or well-grounded: Don't try to justify his rudeness.


» Thai-Eng Dict.