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[fawrth, fohrth] /fɔrθ, foʊrθ/
onward or outward in place or space; forward:
to come forth; go forth.
onward in time, in order, or in a series:
from that day forth.
out, as from concealment or inaction; into view or consideration:
The author's true point comes forth midway through the book.
away, as from a place or country:
to journey forth.
Archaic. out of; forth from.
Origin of forth
before 900; Middle English, Old English; cognate with German fort; akin to further


[fawrth, fohrth] /fɔrθ, foʊrθ/
Firth of, an arm of the North Sea, in SE Scotland: estuary of Forth River. 48 miles (77 km) long.
a river in S central Scotland, flowing E into the Firth of Forth. 116 miles (187 km) long. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for forth
Contemporary Examples
Historical Examples
  • I had to stand around a little, and pass things, and so forth.

  • forth from a rugged arch, in the dusk below,640 Came mother Cybele!

    Endymion John Keats
  • It was all a question of the lie of the land, and strategy, and so forth.

    Hilda Wade Grant Allen
  • Then forth stepped Hermod the Nimble, the brother of Baldur.

    The Children of Odin Padraic Colum
  • Padding back and forth were things which might have been conceived by demons.

British Dictionary definitions for forth


forward in place, time, order, or degree
out, as from concealment, seclusion, or inaction
away, as from a place or country
and so on; et cetera
(archaic) out of; away from
Word Origin
Old English; related to Middle High German vort; see for, further


Firth of Forth, an inlet of the North Sea in SE Scotland: spanned by a cantilever railway bridge 1600 m (almost exactly 1 mile) long (1889), and by a road bridge (1964)
a river in S Scotland, flowing generally east to the Firth of Forth. Length: about 104 km (65 miles)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for forth

Old English forð "forward, onward, further, continually," perfective of fore, from Proto-Germanic *furtha- (cf. Old Frisian, Old Saxon forth "forward, onward," Old Norse forð, Dutch voort, German fort), from PIE *prto-, from *pr-, from root *per- (1) "forward, through" (see per).

Online Etymology Dictionary, © 2010 Douglas Harper
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forth in Technology

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 ( ANS Forth standard, dpANS6 (
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.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Idioms and Phrases with forth
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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