Noun

(uncountable) hydroelectric power

(Canada, uncountable) electrical power supply; specifically : electrical power provided by a utility (as a publicly-owned one)

''I won't have lights until my house gets the hydro turned on.

(British, countable, dated) A spa.

* (Rudyard Kipling)

She almost lived at hotels and hydros , last year, but that isn't pleasant for her.

(countable, aviation, obsolete)

Noun

(en-noun)

The study of electrical energy; the branch of science dealing with such phenomena.

* 2011 , Jon Henley, The Guardian , 29 Mar 2011:

How does it work, though? It's based on the observation made some 200 years ago that electricity can change the shape of flames.

Electric power/energy as used in homes etc., supplied by power stations or generators.

* 2000 , James Meek, Home-made answer to generating electricity harks back to the past'', ''The Guardian :

Householders could one day be producing as much electricity as all the country's nuclear power stations combined, thanks to the revolutionary application of a device developed in the early 19th century.

* {{quote-magazine, date=2013-07-20, volume=408, issue=8845, magazine=(The Economist)

, title= Out of the gloom , passage=[Rural solar plant] schemes are of little help to industry or other heavy users of electricity . Nor is solar power yet as cheap as the grid. For all that, the rapid arrival of electric light to Indian villages is long overdue. When the national grid suffers its next huge outage, as it did in July 2012 when hundreds of millions were left in the dark, look for specks of light in the villages.}}

Electric charge, or particles carrying such charge

* 1747 , (Benjamin Franklin), letter, 28 Jul 1747:

Restoring the equilibrium in the bottle does not at all affect the Electricity in the man.

* 1837 , William Leithead, Electricity , p. 5:

Attraction, then, is the first phenomenon that arrests our attention, and it is one that is constantly attendant on excitation. It is therefore considered a sure indicator of the presence of electricity in an active state, and forms the basis of all its tests.

* 1873 , (James Clerk Maxwell), :

We may express all these results in a concise and consistent manner by describing an electrified body as charged'' with a certain ''quantity of electricity'' , which we may denote by ''e .

A feeling of excitement; a thrill.

(label) A property of amber and certain other nonconducting substances ("electricks") to attract lightweight material when rubbed, or the cause of this property; now understood to be an imbalance of electric charge.

* 1646 , (Sir Thomas Browne), Pseudodoxia Epidemica , 1st edition, p. 51:

The concretion of Ice will not endure a dry attrition without liquation; for if it be rubbed long with a cloth, it melteth. But Crystal will calefie unto electricity ; that is, a power to attract strawes and light bodies, and convert the needle freely placed.