(be a-, fall a-, fall on) sleep, be dead

Dictionary of Biblical Words:

The term used for death (John 11) in the case of believers; death having been abolished for them by Christ even the fact of sleeping being uncertain (“We shall not all sleep,” 1 Cor. 15:5151Behold, I show you a mystery; We shall not all sleep, but we shall all be changed, (1 Corinthians 15:51).), owing to the Lord’s return.

Strong’s Dictionary of Greek Words:

Number:
2837 (find all occurrences in KJV Bible)
Greek:
κοιμάω
Transliteration:
koimao
Phonic:
koy-mah’-o
Meaning:
from 2749; to put to sleep, i.e. (passively or reflexively) to slumber; figuratively, to decease
KJV Usage:
(be a-, fall a-, fall on) sleep, be dead