[1] : The Collaborative International Dictionary of English v.0.48

sir \sir\, n. oe. sire, f. sire, contr. from the nominative l.
   senior an elder, elderly person, compar. of senex,senis, an
   aged person; akin to gr. ??? old, skr. sana, goth. sineigs
   old, sinista eldest, ir.  gael. sean old, w. hen. cf.
   seignior, senate, seneschal, senior, senor,
   signor, sire, sirrah.
   1. a man of social authority and dignity; a lord; a master; a
      gentleman; -- in this sense usually spelled sire. obs.
      1913 webster

            he was crowned lord and sire.         --gower.
      1913 webster

            in the election of a sir so rare.     --shak.
      1913 webster

   2. a title prefixed to the christian name of a knight or a
      baronet.
      1913 webster

            sir horace vere, his brother, was the principal in
            the active part.                      --bacon.
      1913 webster

   3. an english rendering of the latin dominus, the academical
      title of a bachelor of arts; -- formerly colloquially, and
      sometimes contemptuously, applied to the clergy. --nares.
      1913 webster

            instead of a faithful and painful teacher, they hire
            a sir john, which hath better skill in playing at
            tables, or in keeping of a garden, than in god's
            word.                                 --latimer.
      1913 webster

   4. a respectful title, used in addressing a man, without
      being prefixed to his name; -- used especially in speaking
      to elders or superiors; sometimes, also, used in the way
      of emphatic formality. "what's that to you, sir?"
      --sheridan.
      1913 webster

   note: anciently, this title, was often used when a person was
         addressed as a man holding a certain office, or
         following a certain business. "sir man of law." "sir
         parish priest." --chaucer.
         1913 webster

   sir reverance. see under reverence, n.
      1913 webster
see also:
seignior senate seneschal senior senor signor 
sire sirrah sir reverance reverence 

[2] : WordNet (r) 2.0

sir
     n 1: term of address for a man
     2: a title used before the name of knight or baronet

[3] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sir
     save instruction recognition
     
     

[4] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sir
     serial infrared hp
     
     

[5] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sir
     selective information retrieval
     
     

[6] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sir
     sicherheit im rechenzentrum tps
     
     

[7] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sir
     statistical information retrieval
     
     

[8] : Virtual Entity of Relevant Acronyms (Version 1.9, June 2002)

sir
     sustained information rate smds
     
     

[9] : The Free On-line Dictionary of Computing (27 SEP 03)

sir
     
        1.  an early system on the ibm 650.
     
        listed in cacm 25:16, may 1959.
     
        2.  serial infrared.  an infrared standard from
        irda, part of irda data.  sir supports asynchronous
        communications at 9600 bps - 115.2 kbps, at a distance of up
        to 1 metre.
     
        reference?
     
        1999-10-14
     
     
see also:
ibm 650 infrared standard irda irda data asynchronous 

[10] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

sire. a title of honor given to kings or emperors in speaking or writing to 
them. 

Sir >> S Words
Sir, definition of term: Sir
sir_pag1.html

Sir Isaac Newto >> S Words
Sir Isaac Newto, definition of term: Sir Isaac Newto
sir+isaac+newto_pag1.html