[1] : WordNet (r) 2.0

signal-to-noise ratio
     n : the ratio of signal intensity to noise intensity syn: signal-to-noise,
          signal/noise ratio, signal/noise, s/n
see also:
signal-to-noise signal/noise ratio signal/noise s/n 

[2] : Jargon File (4.3.1, 29 Jun 2001)

signal-to-noise ratio from analog electronics n. used by hackers in a
   generalization of its technical meaning. `signal' refers to useful
   information conveyed by some communications medium, and `noise' to
   anything else on that medium. hence a low ratio implies that it is not
   worth paying attention to the medium in question. figures for such
   metaphorical ratios are never given. the term is most often applied to
   usenet newsgroups during flame wars. compare bandwidth. see also
   coefficient of x, lost in the noise.


see also:
usenet flame war bandwidth coefficient of x lost in the noise 

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

signal-to-noise ratio
     
        1.  snr, "s/n ratio", "s:n ratio" "signal"
        refers to useful information conveyed by some communications
        medium, and "noise" to anything else on that medium.  the
        ratio of these is usually expressed logarithmically, in
        decibels.
     
        2.  the term is often applied to usenet
        newsgroups though figures are never given.  here it is quite
        common to have more noise inappropriate postings which
        contribute nothing than signal relevant, useful or
        interesting postings.  the signal gets lost in the noise
        when it becomes too much effort to try to find interesting
        articles among all the crud.  posting "noise" is probably the
        worst breach of netiquette and is a waste of bandwidth.
     
        jargon file
     
        1996-01-29
     
     
see also:
decibels usenet lost in the noise netiquette bandwidth jargon file 

Aspect Ratio >> A Words
Aspect Ratio, definition of term: Aspect Ratio
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