Source : Webster's Revised Unabridged Dictionary (1913)

Flex \Flex\, v. t. [imp. & p. p. {Flexed}; p. pr. & vb. n.
   {Flexing}.] [L. flexus, p. p. of flectere to bend, perh.
   flectere and akin to falx sickle, E. falchion. Cf. {Flinch}.]
   To bend; as, to flex the arm.

Flex \Flex\, n.
   Flax. [Obs.] --Chaucer.

Source : WordNet®

flex
     v 1: contract; "flex a muscle"
     2: exhibit the strength of; "The victorious army flexes its
        invincibility"
     3: form a curve; "The stick does not bend" [syn: {bend}] [ant:
        {straighten}]
     4: bend a joint; "flex your wrists"; "bend your knees" [syn: {bend}]
     5: cause (a plastic object) to assume a crooked or angular
        form; "bend the rod"; "twist the dough into a braid"; "the
        strong man could turn an iron bar" [syn: {bend}, {deform},
         {twist}, {turn}] [ant: {unbend}]

flex
     n : the act of flexing; "he gave his biceps a flex to impress
         the ladies"

Source : Free On-Line Dictionary of Computing

Flex
     
         A system developed by Ian Currie (Iain?)
        at the (then) {Royal Signals and Radar Establishment} at
        Malvern in the late 1970s.  The hardware was custom and
        {microprogrammable}, with an {operating system}, (modular)
        {compiler}, editor, {garbage collector} and {filing system}
        all written in {Algol-68}.  Flex was also re-implemented on
        the {Perq}(?).
     
        [I. F. Currie and others, "Flex Firmware", Technical Report,
        RSRE, Number 81009, 1981].
     
        [I. F. Currie, "In Praise of Procedures", RSRE, 1982].
     
        (1997-11-17)

FLEX
     
         1. Faster LEX.  A reimplementation of the {Lex}
        {scanner} generator by Vern Paxson .
     
        {Flex++} produces {C++} and {aflex} produces {Ada}.
     
        FTP flex-2.3.8.tar.Z from a {GNU archive site} or
        {(ftp://ftp.ee.lbl.gov/pub/flex-2.4.3.tar.Z)}.
     
        ["The FLEX Scanner Generator", Vern Paxson ,
        Systems Engineering, LBL, CA].
     
        2. A {real-time} language for dynamic environments.
     
        ["FLEX: Towards Flexible Real-Time Programs", K. Lin et al,
        Computer Langs 16(1):65-79, Jan 1991].
     
        3. An early {object-oriented} language developed for the
        {FLEX} machine by {Alan Kay} in about 1967.  The FLEX language
        was a simplification of {Simula} and a predecessor of
        {Smalltalk}.
     
        (1995-03-29)

Flex++
     
        {GNU}'s {Flex} {scanner generator} retargeted to {C++} by
        Alain Coetmeur .  Version 3.0.
     
        {(ftp://iecc.com/pub/file/flex++.tar.gz)}.
        {(ftp://iecc.com/pub/file/misc++.tar.gz)}.
       
     {(ftp://ftp.th-darmstadt.de/pub/programming/languages/C++/tools/flex++-3.0.tar.gz)}.
     
        (1993-07-08)