Noun

(en noun)

A sign made to give notice of some occurrence, command, or danger, or to indicate the start of a concerted action.

* Milton

All obeyed / The wonted signal and superior voice / Of this great potentate.

An on-off light, semaphore, or other device used to give an indication to another person.

(of a radio, TV, telephone, internet, etc) An electrical or electromagnetic action, normally a voltage that is a function of time that conveys the information of the radio or TV program or of communication with another party.

My mobile phone can't get a signal in the railway station.

A token; an indication; a foreshadowing; a sign.

* Shakespeare

The weary sun / Gives signal of a goodly day to-morrow.

* De Foe

There was not the least signal of the calamity to be seen.

Useful information, as opposed to noise.

(computing, Unix) A simple interprocess communication used to notify a process or thread of an occurrence.

Noun

(auguries)

A divination based on the appearance and behaviour of animals.

(by extension) An omen or prediction; a foreboding; a prophecy.

* (Edgar Allan Poe)

In Wordsworth's first preludings there is but a dim foreboding of the creator of an era. From Southey's early poems, a safer augury might have been drawn.

An event that is experienced as indicating important things to come.

*{{quote-book, year=1928, author=Lawrence R. Bourne

, title=Well Tackled! , chapter=2 citation , passage=Evidently he did not mean to be a mere figurehead, but to carry on the old tradition of Wilsthorpe's; and that was considered to be a good thing in itself and an augury for future prosperity.}}