Vine's Expository Dictionary of NT Words
lit., "a being away from," is used in Philippians 2:12 , of the Apostle's absence from Philippi in contrast to his parousia, his presence with the saints there (parousia does not signify merely "a coming," it includes or suggests "the presence" which follows the arrival).
lit., "to be away from people" (ek, "from," or "out of," demos, "people"), came to mean either (a) "to go abroad, depart;" the Apostle Paul uses it to speak of departing from the body as the earthly abode of the spirit, 2 Corinthians 5:8; or (b) "to be away;" in the same passage, of being here in the body and absent from the Lord (ver. 6), or being absent from the body and present with the Lord (ver. 8). Its other occurrence is in ver. 9.
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Vines, W. E., M. A. Entry for 'Absence, Absent'. Vine's Expository Dictionary of NT Words. https://www.studylight.org/dictionaries/eng/ved/a/absence-absent.html. 1940.