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Meaning of THUMB

Pronunciation:  thum

WordNet Dictionary
  1. [n]  a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
  2. [n]  the part of a glove that provides a covering for the thumb
  3. [n]  the thick short innermost digit of the forelimb
  4. [v]  feel or handle with the fingers; "finger the binding of the book"
  5. [v]  travel by getting free rides from motorists
  6. [v]  look through a book or other written material; "He thumbed through the report"; "She leafed through the volume"

THUMB is a 5 letter word that starts with T.


 Synonyms: finger, flick, flip, hitch, hitchhike, leaf, ovolo, pollex, quarter round, riff, riffle
 See Also: covering, echinus, finger, glove, gloves, molding, moulding, musculus abductor pollicis, peruse, ride, thumbnail, touch



Webster's 1913 Dictionary
  1. \Thumb\, n. [OE. thombe, thoumbe, [thorn]ume, AS.
    [thorn][=u]ma; akin to OFries. th[=u]ma, D. duim, G. daumen,
    OHG. d[=u]mo, Icel. [thorn]umall, Dan. tommelfinger, Sw.
    tumme, and perhaps to L. tumere to swell. [root]56. Cf.
    {Thimble}, {Tumid}.]
    The short, thick first digit of the human hand, differing
    from the other fingers in having but two phalanges; the
    pollex. See {Pollex}.
          Upon his thumb he had of gold a ring.    --Chaucer.
    {Thumb band}, a twist of anything as thick as the thumb.
    {Thumb blue}, indigo in the form of small balls or lumps,
       used by washerwomen to blue linen, and the like.
    {Thumb latch}, a door latch having a lever formed to be
       pressed by the thumb.
    {Thumb mark}.
    (a) The mark left by the impression of a thumb, as on the
        leaves of a book. --Longfellow.
    (b) The dark spot over each foot in finely bred black and tan
    {Thumb nut}, a nut for a screw, having wings to grasp between
       the thumb and fingers in turning it; also, a nut with a
       knurled rim for the same perpose.
    {Thumb ring}, a ring worn on the thumb. --Shak.
    {Thumb stall}.
    (a) A kind of thimble or ferrule of iron, or leather, for
        protecting the thumb in making sails, and in other work.
    (b) (Mil.) A buckskin cushion worn on the thumb, and used to
        close the vent of a cannon while it is sponged, or
    {Under one's thumb}, completely under one's power or
       influence; in a condition of subservience. [Colloq.]
  2. \Thumb\, v. t. [imp. & p. p. {Thumbed}; p. pr. & vb. n.
    1. To handle awkwardly. --Johnson.
    2. To play with the thumbs, or with the thumbs and fingers;
       as, to thumb over a tune.
    3. To soil or wear with the thumb or the fingers; to soil, or
       wear out, by frequent handling; also, to cover with the
       thumb; as, to thumb the touch-hole of a cannon.
             He gravely informed the enemy that all his cards had
             been thumbed to pieces, and begged them to let him
             have a few more packs.                --Macaulay.
  3. \Thumb\, v. i.
    To play with the thumb or thumbs; to play clumsily; to thrum.
Computing Dictionary
  1. An extension to the advanced risc machine architecture, announced on 06 March 1995 by advanced risc machines Ltd. By identifying the critical subset of the ARM instruction set and encoding it into 16 bits, ARM has succeeded in reducing typical program size by 30-40% from ARM's already excellent code density. Since this Thumb instruction set uses less memory for program storage, cost is further reduced.

    All Thumb-aware processor cores combine the capability to execute both the 32-bit ARM and the 16-bit Thumb instruction sets. Careful design of the Thumb instructions allow them to be decompressed into full ARM instructions transparently during normal instruction decoding without any performance penalty. This differs from other 32-bit processors, like the intel 486sx, with a 16-bit data bus, which require two 16-bit memory accesses to execute every 32-bit instruction and so halve performance.

    The patented Thumb decompressor has been carefully designed with only a small amount of circuitry additional to the existing instruction decoder, so chip size and thus cost do not significantly increase. Designers can easily interleave fast ARM instructions (for performance critical parts of a program) with compact Thumb code to save memory.

  2. The slider or "bubble" on a window system scrollbar. So called because moving it allows you to browse through the contents of a text window in a way analogous to thumbing through a book.

    [jargon file]

Dream Dictionary
 Definition: Seeing a thumb in your dream indicates that you need to get a grip on things. It is symbolic of power and ability, Dreaming that you have no thumbs indicates poverty and loneliness. Dreaming that you have an abnormally large thumb means a rapid rise to success. Dreaming that your thumb has a very long nail indicates that you will be lured by into evil by seeking strange illicit pleasures.