plural of signaller

(British spelling) One who signals. / (rail transport) synonym of signalman

(often pluralized) A method of long-distance communication sometimes used in ancient and undeveloped societies, consisting of messages conveyed by means of columns or intermittent puffs of smoke.

An American crayfish, Pacifastacus leniusculus, having a large claw that it waves to attract a mate.

plural of signal box

A building, typically adjacent to or spanning a railway line, from where signals, points and (sometimes) level crossings are controlled. / The alarm-box of a police or fire-alarm system.

An unclear message, often contradicting a situation.

An event or emanation to which a sensing device gives an undesired positive response.

(US, telephony) An audible signal to the calling party that indicates failure to complete the requested connection; an engaged tone

an instance of sharing or disseminating another's information or material with one's own audience / (engineering) an increase in the capacity, strength, or range of a signal