The Collaborative International Dictionary of English v.0.48:

Forth \Forth\, prep.
   Forth from; out of. [Archaic]
   [1913 Webster]

         Some forth their cabins peep.            --Donne.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forth \Forth\, v.[AS. for[eth], fr. for akin to D. voort, G.
   fort [root]78. See Fore, For, and cf. Afford,
   Further, adv.]
   1. 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.
      [1913 Webster]

            Lucas was Paul's companion, at the leastway from the
            sixteenth of the Acts forth.          --Tyndale.
      [1913 Webster]

            From this time forth, I never will speak word.
                                                  --Shak.
      [1913 Webster]

            I repeated the Ave Maria; the inquisitor bad me say
            forth; I said I was taught no more.   --Strype.
      [1913 Webster]

   2. 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.
      [1913 Webster]

            When winter past, and summer scarce begun,
            Invites them forth to labor in the sun. --Dryden.
      [1913 Webster]

   3. Beyond a (certain) boundary; away; abroad; out.
      [1913 Webster]

            I have no mind of feasting forth to-night. --Shak.
      [1913 Webster]

   4. Throughly; from beginning to end. [Obs.] --Shak.
      [1913 Webster]

   And so forth, Back and forth, From forth. See under
      And, Back, and From.

   Forth of, Forth from, out of. [Obs.] --Shak.

   To bring forth. See under Bring.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Forth \Forth\, n. [OE., a ford. ? 78. See Frith.]
   A way; a passage or ford. [Obs.] --Todd.
   [1913 Webster]

WordNet (r) 3.0 (2006):

forth
    adv 1: from a particular thing or place or position (`forth' is
           obsolete); "ran away from the lion"; "wanted to get away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" [syn: away, off, forth]
    2: forward in time or order or degree; "from that time forth";
       "from the sixth century onward" [syn: forth, forward,
       onward]
    3: out into view; "came forth from the crowd"; "put my ideas
       forth"
    n 1: a river in southern Scotland that flows eastward to the
         Firth of Forth [syn: Forth, Forth River]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "forth":
   ahead, alee, along, away, en route to, for, forward, forwards,
   hence, off, on, onward, onwards, out, outward, outwardly, outwards,
   thence, therefrom, thereof, whence



The Free On-line Dictionary of Computing (30 December 2018):

FORTH

   1.  An interactive extensible language using
   postfix syntax and a data stack, developed by Charles
   H. Moore in the 1960s.  FORTH is highly user-configurable and
   there are many different implementations, the following
   description is of a typical default configuration.

   Forth programs are structured as lists of "words" - FORTH's
   term which encompasses language keywords, primitives and
   user-defined subroutines.  Forth takes the idea of
   subroutines to an extreme - nearly everything is a subroutine.
   A word is any string of characters except the separator which
   defaults to space.  Numbers are treated specially.  Words are
   read one at a time from the input stream and either executed
   immediately ("interpretive execution") or compiled as part of
   the definition of a new word.

   The sequential nature of list execution and the implicit use
   of the data stack (numbers appearing in the lists are pushed
   to the stack as they are encountered) imply postfix syntax.
   Although postfix notation is initially difficult, experienced
   users find it simple and efficient.

   Words appearing in executable lists may be "primitives"
   (simple assembly language operations), names of previously
   compiled procedures or other special words.  A procedure
   definition is introduced by ":" and ended with ";" and is
   compiled as it is read.

   Most Forth dialects include the source language structures
   BEGIN-AGAIN, BEGIN-WHILE-REPEAT, BEGIN-UNTIL, DO-LOOP, and
   IF-ELSE-THEN, and others can be added by the user.  These are
   "compiling structures" which may only occur in a procedure
   definition.

   FORTH can include in-line assembly language between "CODE"
   and "ENDCODE" or similar constructs.  Forth primitives are
   written entirely in assembly language, secondaries contain a
   mixture.  In fact code in-lining is the basis of compilation
   in some implementations.

   Once assembled, primitives are used exactly like other words.
   A significant difference in behaviour can arise, however, from
   the fact that primitives end with a jump to "NEXT", the entry
   point of some code called the sequencer, whereas
   non-primitives end with the address of the "EXIT" primitive.
   The EXIT code includes the scheduler in some multi-tasking
   systems so a process can be descheduled after executing a
   non-primitive, but not after a primitive.

   Forth implementations differ widely.  Implementation
   techniques include threaded code, dedicated Forth
   processors, macros at various levels, or interpreters
   written in another language such as C.  Some implementations
   provide real-time response, user-defined data structures,
   multitasking, floating-point arithmetic, and/or virtual
   memory.

   Some Forth systems support virtual memory without specific
   hardware support like MMUs.  However, Forth virtual memory
   is usually only a sort of extended data space and does not
   usually support executable code.

   FORTH does not distinguish between operating system calls
   and the language.  Commands relating to I/O, file systems
   and virtual memory are part of the same language as the
   words for arithmetic, memory access, loops, IF statements, and
   the user's application.

   Many Forth systems provide user-declared "vocabularies" which
   allow the same word to have different meanings in different
   contexts.  Within one vocabulary, re-defining a word causes
   the previous definition to be hidden from the interpreter (and
   therefore the compiler), but not from previous definitions.

   FORTH was first used to guide the telescope at NRAO, Kitt
   Peak.  Moore considered it to be a fourth-generation
   language but his operating system wouldn't let him use six
   letters in a program name, so FOURTH became FORTH.

   Versions include fig-FORTH, FORTH 79 and FORTH 83.

   FAQs
   (http://complang.tuwien.ac.at/forth/faq/faq-general-2.html).
   ANS Forth standard, dpANS6
   (http://taygeta.com/forth/dpans.html).

   FORTH Interest Group, Box 1105, San Carlos CA 94070.

   See also 51forth, F68K, cforth, E-Forth, FORML,
   TILE Forth.

   [Leo Brodie, "Starting Forth"].

   [Leo Brodie, "Thinking Forth"].

   [Jack Woehr, "Forth, the New Model"].

   [R.G. Loeliger, "Threaded Interpretive Languages"].

   2. FOundation for Research and Technology - Hellas.

   (1997-04-16)