Strong’s Greek
G3153 — mataiotes
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ματαιότης
mataiotes — pronounced mat-ah-yot'-ace
from 3152; inutility; figuratively, transientness; morally, depravity:--vanity. see GREEK for 3152
3 occurrences in the KJV.
Romans 8:20
For the creature was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope,
Ephesians 4:17
This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind,
2 Peter 2:18
For when they speak great swelling words of vanity, they allure through the lusts of the flesh, through much wantonness, those that were clean escaped from them who live in error.