The electrified rail that runs beside or between train tracks to power electric trains. / (by extension) Anything that is dangerous to come into contact with, or is best avoided.

(UK, military, nautical, historical) A third-rate ship of the line.

(business, commerce) Someone not directly involved in a transaction; an entity beyond the seller (first party) and customer (second party).

(UK, military, nautical, historical) Of a Royal Navy ship of the line in the Napoleonic Era: having 64–80 guns across two gun decks, a complement of 500–650, and weighing approximately 1,750 tons burthen.

(US) A reduced-rate mail service for printed matter. / (Britain, historical) The cheapest accommodation on a train or ship.

(netball) The central third of a netball court.

(netball) One of two thirds of a netball court nearest the goal ring.

the quality, of depth or thickness, that differentiates a solid object from a two-dimensional image of it

(cricket) a fielding position on the off side, behind square, near the boundary; a fielder in that position

(cricket) A match official who uses TV replays to assist the two umpires in the case of close decisions.