(v): separate with or as if with an instrument
(v): beat severely with a whip or rod
(v): give a beating to; subject to a beating, either as a punishment or as an act of aggression
(v): cut open
(v): separate with or as if with an instrument
(v): cut drastically
(v): cut down on; make a reduction in
(v): move or stir about violently
(v): move or cause to move back and forth
(n): a wound made by cutting
(n): an injury to living tissue (especially an injury involving a cut or break in the skin)
(n): an open tract of land in a forest that is strewn with debris from logging (or fire or wind)
(n): the solid part of the earth's surface
(n): a punctuation mark (/) used to separate related items of information
(n): the marks used to clarify meaning by indicating separation of words into sentences and clauses and phrases
(n): a strong sweeping cut made with a sharp instrument
(n): the act of penetrating or opening open with a sharp edge
Also, slang for the act of urination. E.g.
"Hey mate, watch my pint while I go for a slash", or
"Where's Jonny?" "Dunno. Hang on, he's round the corner there having a slash."
A nerdy way of saying "or", as in "We will be ordering beef slash chicken."