From BiblePortal Wikipedia

Vine's Expository Dictionary of NT Words [1]

1: Ἔξω (Strong'S #1854 — Adverb — exo — ex'-o )

"outside, without" (from, ek, "out of, from"), frequently signifies "forth," especially after verbs of motion, e.g.,  John 11:43;  19:4,13 . See Outward , Strange , Without.

 Matthew 26:16 Matthew 22:46 John 11:53 John 2:11

King James Dictionary [2]

Forth adv.

1. Forward onward in time in advance as from that day forth from that time forth. 2. Forward in place or order as one, two, three, and so forth. 3. Out aboard noting progression or advance from a state of confinement as, the plants in spring put forth leaves.

When winter past, and summer scarce begun, invites them forth to labor in the sun.

4. Out away beyond the boundary of a place as, send him forth of France. Little used. 5. Out into public view, or public character. Your country calls you forth into its service. 6. Thoroughly from beginning to end. Obs. 7. On to the end. obs.

FORTH, prep. Out of.

From forth the streets of Pomfret.

Some forth their cabins peep.

Webster's Dictionary [3]

(1): ( adv.) Throughly; from beginning to end.

(2): ( prep.) Forth from; out of.

(3): ( adv.) Forward; onward in time, place, or order; in advance from a given point; on to end; as, from that day forth; one, two, three, and so forth.

(4): ( adv.) Out, as from a state of concealment, retirement, confinement, nondevelopment, or the like; out into notice or view; as, the plants in spring put forth leaves.

(5): ( adv.) Beyond a (certain) boundary; away; abroad; out.

(6): ( n.) A way; a passage or ford.

International Standard Bible Encyclopedia [4]

fōrth  : "Forth," adverb (from "for"), signifies movement (1) forward, (2) out of, (3) beyond a certain boundary. In a few instances in the Old Testament it is the translation of the preposition ‛al , properly "above," "upon" ( 2 Kings 11:15;  2 Chronicles 23:14;  Amos 7:17 the King James Version), and of ḥūc , "without" ( Genesis 39:13;  Judges 19:25 ). "Forth" is often used as an expletive of various verbs, as "break (forth)," "bring (forth)," "call (forth)," etc. In the Gospel of John it is the translation of éxō , "without," as "Lazarus, come forth" ( John 11:43; so  John 15:6;  John 19:4 the King James Version, etc.; also   Acts 5:34;  Acts 9:40 ). "Stand forth" in  Mark 3:3 is the translation of égeire eis tó méson , margin "Arise into the midst." the Revised Version (British and American) has a great many changes, frequently substituting "out," "away," "abroad," etc.; "forth from" for "out of" ( Job 41:21;  Isaiah 45:23 ); "spread forth" for "stretched out" ( Psalm 44:20;  Psalm 88:9;  Psalm 136:6 ), etc. In  Colossians 1:6 , for "bringeth forth fruit" the Revised Version (British and American) reads "bearing fruit."

The Nuttall Encyclopedia [5]

A river of Scotland, formed by the junction of Duchray Water and the Avondhu, streams which rise one on Ben Lomond and the other on Ben Venue, and which, after 14 and 9 m., unite at Aberfoyle; the river thence flows with many windings, called Links, through some of the fairest country of the eastern lowlands to Alloa (51½ m.), where begins the Firth, which stretches 51 m. to the German Ocean, and which at Queensferry is spanned by a massive railway bridge known as the Forth Bridge (1882-1890).