The Collaborative International Dictionary of English v.0.48:

Narrow \Nar"row\ (n[a^]r"r[-o]), a. [Compar. Narrower
   (n[a^]r"r[-o]*[~e]r); superl. Narrowest.] [OE. narwe, naru,
   AS. nearu; akin to OS. naru, naro.]
   1. Of little breadth; not wide or broad; having little
      distance from side to side; as, a narrow board; a narrow
      street; a narrow hem.
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            Hath passed in safety through the narrow seas.
                                                  --Shak.
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   2. Of little extent; very limited; circumscribed.
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            The Jews were but a small nation, and confined to a
            narrow compass in the world.          --Bp. Wilkins.
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   3. Having but a little margin; having barely sufficient
      space, time, or number, etc.; close; near[5]; -- with
      special reference to some peril or misfortune; as, a
      narrow shot; a narrow escape; a narrow miss; a narrow
      majority. --Dryden.
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   4. Limited as to means; straitened; pinching; as, narrow
      circumstances.
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   5. Contracted; of limited scope; illiberal; bigoted; as, a
      narrow mind; narrow views. "A narrow understanding."
      --Macaulay.
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   6. Parsimonious; niggardly; covetous; selfish.
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            A very narrow and stinted charity.    --Smalridge.
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   7. Scrutinizing in detail; close; accurate; exact.
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            But first with narrow search I must walk round
            This garden, and no corner leave unspied. --Milton.
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   8. (Phon.) Formed (as a vowel) by a close position of some
      part of the tongue in relation to the palate; or
      (according to Bell) by a tense condition of the pharynx;
      -- distinguished from wide; as [=e] ([=e]ve) and [=oo]
      (f[=oo]d), etc., from [i^] ([i^]ll) and [oo^] (f[oo^]t),
      etc. See Guide to Pronunciation, [sect]13.
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   Note: Narrow is not unfrequently prefixed to words,
         especially to participles and adjectives, forming
         compounds of obvious signification; as,
         narrow-bordered, narrow-brimmed, narrow-breasted,
         narrow-edged, narrow-faced, narrow-headed,
         narrow-leaved, narrow-pointed, narrow-souled,
         narrow-sphered, etc.
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   Narrow gauge. (Railroad) See Note under Gauge, n., 6.
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The Collaborative International Dictionary of English v.0.48:

Narrow \Nar"row\, v. i.
   1. To become less broad; to contract; to become narrower; as,
      the sea narrows into a strait.
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   2. (Man.) Not to step out enough to the one hand or the
      other; as, a horse narrows. --Farrier's Dict.
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   3. (Knitting) To contract the size of a stocking or other
      knit article, by taking two stitches into one.
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The Collaborative International Dictionary of English v.0.48:

Narrow \Nar"row\, n.; pl. Narrows.
   A narrow passage; esp., a contracted part of a stream, lake,
   or sea; a strait connecting two bodies of water; -- usually
   in the plural; as, The Narrows of New York harbor.
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         Near the island lay on one side the jaws of a dangerous
         narrow.                                  --Gladstone.
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The Collaborative International Dictionary of English v.0.48:

Narrow \Nar"row\, v. t. [imp. & p. p. Narrowed; p. pr. & vb.
   n. Narrowing.] [AS. nearwian.]
   1. To lessen the breadth of; to contract; to draw into a
      smaller compass; to reduce the width or extent of. --Sir
      W. Temple.
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   2. To contract the reach or sphere of; to make less liberal
      or more selfish; to limit; to confine; to restrict; as, to
      narrow one's views or knowledge; to narrow a question in
      discussion.
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            Our knowledge is much more narrowed if we confine
            ourselves to our own solitary reasonings. --I.
                                                  Watts.
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   3. (Knitting) To contract the size of, as a stocking, by
      taking two stitches into one.
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WordNet (r) 3.0 (2006):

narrow
    adj 1: not wide; "a narrow bridge"; "a narrow line across the
           page" [ant: broad, wide]
    2: limited in size or scope; "the narrow sense of a word"
    3: lacking tolerance or flexibility or breadth of view; "a
       brilliant but narrow-minded judge"; "narrow opinions" [syn:
       narrow-minded, narrow] [ant: broad-minded]
    4: very limited in degree; "won by a narrow margin"; "a narrow
       escape" [ant: wide]
    5: characterized by painstaking care and detailed examination;
       "a minute inspection of the grounds"; "a narrow scrutiny";
       "an exact and minute report" [syn: minute, narrow]
    n 1: a narrow strait connecting two bodies of water
    v 1: make or become more narrow or restricted; "The selection
         was narrowed"; "The road narrowed" [syn: narrow,
         contract] [ant: widen]
    2: define clearly; "I cannot narrow down the rules for this
       game" [syn: pin down, peg down, nail down, narrow
       down, narrow, specify]
    3: become more focus on an area of activity or field of study;
       "She specializes in Near Eastern history" [syn: specialize,
       specialise, narrow, narrow down] [ant: branch out,
       broaden, diversify]
    4: become tight or as if tight; "Her throat constricted" [syn:
       constrict, constringe, narrow]