Noah Webster's New International Dictionary of the English Language
1. (adv.) Forward; onward in time; into view; in advance from a given point; on to end; as, from that day forth; one, two, three, and so forth.
2. (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.
3. (adv.) Beyond a (certain) boundary; away; abroad; out.
4. (adv.) Thoroughly; from beginning to end.
5. (prep.) Forth from; out of.
6. (n.) A way; a passage or ford.