The Collaborative International Dictionary of English v.0.48:

Slash \Slash\, v. t. [imp. & p. p. Slashed; p. pr. & vb. n.
   Slashing.] [OE. slaschen, of uncertain origin; cf. OF.
   esclachier to break, esclechier, esclichier, to break, and E.
   slate, slice, slit, v. t.]
   1. To cut by striking violently and at random; to cut in long
      slits.
      [1913 Webster]

   2. To lash; to ply the whip to. [R.] --King.
      [1913 Webster]

   3. To crack or snap, as a whip. [R.] --Dr. H. More.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slash \Slash\, v. i.
   To strike violently and at random, esp. with an edged
   instrument; to lay about one indiscriminately with blows; to
   cut hastily and carelessly.
   [1913 Webster]

         Hewing and slashing at their idle shades. --Spenser.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slash \Slash\, n.
   1. A long cut; a cut made at random.
      [1913 Webster]

   2. A large slit in the material of any garment, made to show
      the lining through the openings.
      [1913 Webster]

   3. [Cf. Slashy.] pl. Swampy or wet lands overgrown with
      bushes. [Local, U.S.] --Bartlett.
      [1913 Webster]

   4. A opening or gap in a forest made by wind, fire, or other
      destructive agency.

            We passed over the shoulder of a ridge and around
            the edge of a fire slash, and then we had the
            mountain fairly before us.            --Henry Van
                                                  Dyke.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

slash
    n 1: a wound made by cutting; "he put a bandage over the cut"
         [syn: cut, gash, slash, slice]
    2: an open tract of land in a forest that is strewn with debris
       from logging (or fire or wind)
    3: a punctuation mark (/) used to separate related items of
       information [syn: solidus, slash, virgule, diagonal,
       stroke, separatrix]
    4: a strong sweeping cut made with a sharp instrument [syn:
       slash, gash]
    v 1: cut with sweeping strokes; as with an ax or machete [syn:
         slash, cut down]
    2: beat severely with a whip or rod; "The teacher often flogged
       the students"; "The children were severely trounced" [syn:
       flog, welt, whip, lather, lash, slash, strap,
       trounce]
    3: cut open; "she slashed her wrists" [syn: slash, gash]
    4: cut drastically; "Prices were slashed"
    5: move or stir about violently; "The feverish patient thrashed
       around in his bed" [syn: convulse, thresh, thresh
       about, thrash, thrash about, slash, toss,
       jactitate]

Moby Thesaurus II by Grady Ward, 1.0:

260 Moby Thesaurus words for "slash":
   Vandyke, abbreviate, abrade, abrasion, abridge, amputate, assail,
   attack, ax, band, bar, bark, beat, beat down, bend, bias, bisect,
   blaze, blemish, blister, bloody, breach, break, breakage, burn,
   burr, burst, butcher, carve, castigate, catercorner, chafe,
   cheapen, cheapening, check, chip, chiseling, chop, claw, cleave,
   cleft, clip, concussion, crack, crackle, craze, crenellate,
   crenulate, crimp, cross-hatching, curtail, cut, cut across,
   cut away, cut back, cut crosswise, cut down, cut in two, cut off,
   cut prices, dash, decline, decrease, deflate, deflation,
   delineation, demitint, depreciate, depreciation, devaluate,
   devaluation, diagonal, diagonalize, dichotomize, dissever, dive,
   dotted line, drop, engravement, engraving, etch, etching, excise,
   excoriate, fall, fall in price, fissure, flagellate, flail,
   flash burn, flay, flog, fracture, fray, frazzle, fret, fustigate,
   gall, gap, gash, gem-engraving, give way, glass-cutting, glyptic,
   gouge, graving, hachure, hack, hackle, haggle, hairline, half tint,
   halve, hatching, hew, horsewhip, hurt, incise, incision, indent,
   injure, injury, inscript, inscription, jag, jew down, jigsaw,
   knife, knurl, lacerate, laceration, lambaste, lance, lash, lesion,
   line, lineation, lining, lower, lowering, machicolate, maim,
   make mincemeat of, mark down, markdown, marking, maul, mill,
   mortal wound, mutilate, mutilation, nick, nose dive, nose-dive,
   notch, oblique, oblique angle, oblique figure, oblique line, pare,
   picot, pierce, pink, plummet, plummeting, plunge, price cut,
   price fall, price reduction, prune, puncture, reduce, reduction,
   rend, rent, retrench, rhomboid, rift, rip, rive, roast, run,
   rupture, sag, savage, saw, scald, scale, scallop, scar, scarify,
   scathe, scissor, scorch, score, scoring, scotch, scourge, scrape,
   scratch, scratch comma, scratching, scuff, second-degree burn,
   separatrix, serrate, sever, shave, skin, skin alive, slant,
   slant across, slash across, slashing, slice, slit, slump, snip,
   solidus, sore, splinter, split, sprain, stab, stab wound, stick,
   stipple, stippling, strain, streak, streaking, striation, strip,
   stripe, striping, stroke, sublineation, sunder, tear,
   third-degree burn, thrash, tint, tooling, tooth, transverse,
   trauma, traumatize, trim, trounce, type-cutting, underline,
   underlining, underscore, underscoring, virgule, whip, whittle,
   wound, wounds immedicable, wrench



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

slash
 n.

    Common name for the slant (?/?, ASCII 0101111) character. See ASCII for
    other synonyms.


The Free On-line Dictionary of Computing (30 December 2018):

oblique stroke
/
slash

    "/".  Common names include: (forward) slash;
   stroke; ITU-T: slant; oblique stroke.  Rare: diagonal;
   solidus; over; slak; virgule; INTERCAL: slat.

   Commonly used as the division operator in programming, and
   to separate the components in Unix pathnames, and hence
   also in URLs.  Also used to delimit regular expressions in
   several languages.

   (1996-09-24)