Once

Vine's Expository Dictionary of NT Words

1: Ἅπαξ (Strong'S #530 — Adverb — hapax — hap'-ax )

denotes (a) "once, one time,"  2—Corinthians 11:25;  Hebrews 9:7,26,27;  12:26,27; in the phrase "once and again," lit., "once and twice,"  Philippians 4:16;  1—Thessalonians 2:18; (b) "once for all," of what is of perpetual validity, not requiring repetition,  Hebrews 6:4;  9:28;  10:2;  1—Peter 3:18;  Jude 1:3 , RV, "once for all" (AV, "once");  Jude 1:5 (ditto); in some mss.   1—Peter 3:20 (so the AV).

2: Ἐφάπαξ (Strong'S #2178 — Adverb — ephapax — ef-ap'-ax )

a strengthened form of No. 1 (epi, "upon"), signifies (a) "once for all,"  Romans 6:10;  Hebrews 7:27 , RV (AV, "once");  Hebrews 9:12 (ditto); 10:10; (b) "at once,"   1—Corinthians 15:6 .

3: Ποτέ (Strong'S #4218 — particle — pote — pot-eh' )

denotes "once upon a time, formerly, sometime," e.g.,  Romans 7:9;  Galatians 1:23,1 st part, RV, "once" (AV, "in times past"); 2nd part, AV and RV, "once;"  Galatians 2:6 , RV marg., "what they once were" (to be preferred to the text, "whatsoever they were"), the reference probably being to the association of the twelve Apostles with the Lord during His ministry on earth; upon this their partisans based their claim for the exclusive authority of these Apostles, which Paul vigorously repudiated; in  Ephesians 5:8 , RV, "once" (AV, "sometimes"). See Aforetime , Last , Length (at), TIME (past).

 Luke 23:18

King James Dictionary

ONCE, adv. wuns. from one.

1. One time.

Trees that bear mast are fruitful but once in two years.

2. One time, though no more. The mind once tainted with vice is prone to grow worse and worse. 3. At one former time formerly.

My soul had once some foolish fondness for thee, but hence 'tis gone.

4. At the same point of time not gradually.

At once the winds arise, the thunders roll.

At once, at the same time as, they all moved at once hence, when it refers to two or more, the sense is together, as one.

This hath all its force at once, on the first impression.

Once is used as a noun, when preceded by this or that as this once, that once.

ONCE, n. ons. A quadruped of the genus Felis, less than the panther, of a whitish gray color. It is found in Africa and Asia, is easily tamed and is employed like a dog in hunting.

Webster's Dictionary

(1): ( adv.) At some one period of time; - used indefinitely.

(2): ( adv.) At any one time; - often nearly equivalent to ever, if ever, or whenever; as, once kindled, it may not be quenched.

(3): ( adv.) By limitation to the number one; for one time; not twice nor any number of times more than one.