The Collaborative International Dictionary of English v.0.48:

Bang \Bang\, v. t.
   To cut squarely across, as the tail of a horse, or the
   forelock of human beings; to cut (the hair).
   [1913 Webster]

         His hair banged even with his eyebrows.  --The Century
                                                  Mag.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bang \Bang\, n.
   The short, front hair combed down over the forehead, esp.
   when cut squarely across; a false front of hair similarly
   worn; -- usually used in the plural; as, her bangs came down
   almost to her eyes.
   [1913 Webster]

         His hair cut in front like a young lady's bang. --W. D.
                                                  Howells.
   [1913 Webster] Bang

The Collaborative International Dictionary of English v.0.48:

Bang \Bang\, v. i.
   1. To make a loud noise, as if with a blow or succession of
      blows; as, the window blind banged and waked me; he was
      banging on the piano.
      [1913 Webster]

   2. To have sexual intercourse; to fuck. Considered vulgar and
      obscene. [vulgar slang]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Bang \Bang\, n.
   1. A blow as with a club; a heavy blow.
      [1913 Webster]

            Many a stiff thwack, many a bang.     --Hudibras.
      [1913 Webster]

   2. The loud sound produced by a sudden concussion or
      explosion.
      [1913 Webster]

   3. A surge of pleasure; a thrill; -- usually used in the
      phrase get a bang out of; as, I always get a bang out of
      watching an ice skater do a quadruple jump. [informal]

   Syn: kick[5].
        [PJC]

   4. (Printing & Computers) An exclamation point; -- used in
      verbal descriptions of text, in printing and in computer
      technology; as, his email address is tom bang stanford dot
      edu (i.e. tom!stanford.edu). [slang]
      [PJC]

   5. An instance of sexual intercourse; a fuck. Considered
      vulgar and obscene. [vulgar slang]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Bang \Bang\ (b[a^]ng), v. t. [imp. & p. p. Banged; p. pr. &
   vb. n. Banging.] [Icel. banga to hammer; akin to Dan. banke
   to beat, Sw. b[*a]ngas to be impetuous, G. bengel club,
   clapper of a bell.]
   1. To beat, as with a club or cudgel; to treat with violence;
      to handle roughly.
      [1913 Webster]

            The desperate tempest hath so banged the Turks.
                                                  --Shak.
      [1913 Webster]

   2. To beat or thump, or to cause (something) to hit or strike
      against another object, in such a way as to make a loud
      noise; as, to bang a drum or a piano; to bang a door
      (against the doorpost or casing) in shutting it.
      [1913 Webster]

   3. To have sexual intercourse with; to fuck; -- usually used
      with the male as a subject. Considered vulgar or obscene.
      [vulgar slang]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Bang \Bang\, Bangue \Bangue\, n.
   See Bhang.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bang
    adv 1: directly; "he ran bang into the pole"; "ran slap into
           her" [syn: bang, slap, slapdash, smack, bolt]
    n 1: a vigorous blow; "the sudden knock floored him"; "he took a
         bash right in his face"; "he got a bang on the head" [syn:
         knock, bash, bang, smash, belt]
    2: a sudden very loud noise [syn: bang, clap, eruption,
       blast, bam]
    3: a border of hair that is cut short and hangs across the
       forehead [syn: bang, fringe]
    4: the swift release of a store of affective force; "they got a
       great bang out of it"; "what a boot!"; "he got a quick rush
       from injecting heroin"; "he does it for kicks" [syn: bang,
       boot, charge, rush, flush, thrill, kick]
    5: a conspicuous success; "that song was his first hit and
       marked the beginning of his career"; "that new Broadway show
       is a real smasher"; "the party went with a bang" [syn: hit,
       smash, smasher, strike, bang]
    v 1: strike violently; "slam the ball" [syn: slam, bang]
    2: to produce a sharp often metallic explosive or percussive
       sound; "One of them banged the sash of the window nearest my
       bed"
    3: close violently; "He slammed the door shut" [syn: slam,
       bang]
    4: move noisily; "The window banged shut"; "The old man banged
       around the house"
    5: have sexual intercourse with; "This student sleeps with
       everyone in her dorm"; "Adam knew Eve"; "Were you ever
       intimate with this man?" [syn: sleep together, roll in the
       hay, love, make out, make love, sleep with, get
       laid, have sex, know, do it, be intimate, have
       intercourse, have it away, have it off, screw, fuck,
       jazz, eff, hump, lie with, bed, have a go at it,
       bang, get it on, bonk]
    6: leap, jerk, bang; "Bullets spanged into the trees" [syn:
       spang, bang]

The Free On-line Dictionary of Computing (19 January 2023):

bang

    A spoken name for the exclamation mark character
   ("!" ASCII	33) when used as a piece of technical syntax (e.g.
   in a bang path) rather than to mark a command or exclamation.

   [Jargon File]

   (1995-01-31)


The Jargon File (version 4.4.7, 29 Dec 2003):

bang


    1. n. Common spoken name for ! (ASCII 0100001), especially when used in
    pronouncing a bang path in spoken hackish. In elder days this was
    considered a CMUish usage, with MIT and Stanford hackers preferring excl
    or shriek; but the spread of Unix has carried ‘bang’ with it (esp. via
    the term bang path) and it is now certainly the most common spoken name
    for !. Note that it is used exclusively for non-emphatic written !; one
    would not say “Congratulations bang” (except possibly for humorous
    purposes), but if one wanted to specify the exact characters “foo!” one
    would speak “Eff oh oh bang”. See shriek, ASCII.

    2. interj. An exclamation signifying roughly “I have achieved
    enlightenment!”, or “The dynamite has cleared out my brain!” Often used to
    acknowledge that one has perpetrated a thinko immediately after one has
    been called on it.