switch (Noun) — Control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit.
switch (Noun) — An event in which one thing is substituted for another.
switch (Noun) — Hairpiece consisting of a tress of false hair; used by women to give shape to a coiffure.
switch (Noun) — Railway track having two movable rails and necessary connections; used to turn a train from one track to another or to store rolling stock.
switch (Noun) — A flexible implement used as an instrument of punishment.
switch (Noun) — A basketball manoeuvre; two defensive players shift assignments so that each guards the player usually guarded by the other.
switch (Noun) — The act of changing one thing or position for another. ex. "his switch on abortion cost him the election"
switch (Verb) — Change over, change around, as to a new order or sequence.
switch (Verb) — Exchange or give (something) in exchange for.
switch (Verb) — Lay aside, abandon, or leave for another. ex. "switch to a different brand of beer" ex. "She switched psychiatrists"
switch (Verb) — Make a shift in or exchange of. ex. "First Joe led; then we switched"
switch (Verb) — Cause to go on or to be engaged or set in operation. ex. "switch on the light"
switch (Verb) — Flog with or as if with a flexible rod.
switch (Verb) — Reverse (a direction, attitude, or course of action).