Definition of forth

• a river in southern Scotland that flows eastward to the Firth of Forth
• from a particular thing or place or position (`forth is obsolete); "ran away from the lion"; "wanted to get away from there"; "sent the children away to boarding school"; "the teacher waved the children away from the dead animal"; "went off to school"; "they drove off"; "go forth and preach"
• forward in time or order or degree; "from that time forth"; "from the sixth century onward"