Day

"a day," is used of (a) the period of natural light, Genesis 1:5; Proverbs 4:18; Mark 4:35; (b) the same, but figuratively, for a period of opportunity for service, John 9:4; Romans 13:13; (c) one period of alternate light and darkness, Genesis 1:5; Mark 1:13; (d) a period of undefined length marked by certain characteristics, such as "the day of small things," Zechariah 4:10; of perplexity and distress, Isaiah 17:11; Obadiah 1:12-14; of prosperity and of adversity, Ecclesiastes 7:14; of trial or testing, Psalm 95:8; of salvation, Isaiah 49:8; 2—Corinthians 6:2; cp. Luke 19:42; of evil, Ephesians 6:13; of wrath and revelation of the judgments of God, Romans 2:5; (e) an appointed time, Ecclesiastes 8:6; Ephesians 4:30; (f) a notable defeat in battle, etc., Isaiah 9:4; Psalm 137:7; Ezekiel 30:9; Hosea 1:11; (g) by metonymy = "when," "at the time when;" (1), of the past, Genesis 2:4; Numbers 3:13; Deuteronomy 4:10 , (2) of the future, Genesis 2:17; Ruth 4:5; Matthew 24:50; Luke 1:20; (h) a judgment or doom, Job 18:20 . * [* From Notes on Thessalonians, by Hogg and Vine, pp. 150-151.] (i) of a time of life, Luke 1:17,18 ("years").

"brightness, bright shining, as of the sun;" hence, "the beginning of daylight," is translated "break of day" in Acts 20:11 .

the neuter plural of ennuchos, used adverbially, lit., "in night" (en, "in," nux, "night," with lian, "very"), signifies "very early, yet in the night," "a great while before day," Mark 1:35 .