adj

• (figuratively) Restrictive; without flexibility or latitude.
  "a narrow interpretation"
• (dated) Limited as to means; straitened
  "narrow circumstances"
• (phonetics) 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.
• (computing) Of or supporting only those text characters that can fit into the traditional 8-bit representation.
  "a narrow character; a narrow stream"

noun

• (chiefly in the plural) A narrow passage, especially a contracted part of a stream, lake, or sea; a strait connecting two bodies of water.
  "the narrows of New York harbor"

verb

• (transitive) To reduce in width or extent; to contract.
  "We need to narrow the search."
• (intransitive) To get narrower.
  "The road narrows."
• (of a person or eyes) To partially lower one's eyelids in a way usually taken to suggest a defensive, aggressive or penetrating look.
  "He stepped in front of me, narrowing his eyes to slits."
• (knitting) To contract the size of, as a stocking, by taking two stitches into one.