Noun

(uncountable) The act of adding anything.

The addition of five more items to the agenda will make the meeting unbearably long.

Anything that is added.

(uncountable) The arithmetic operation of adding.

(music) A dot at the right side of a note as an indication that its sound is to be lengthened one half.

(legal) A title annexed to a person's name to identify him or her more precisely, as in "John Doe, Esq'.", "Robert Dale, '''Mason'''", "Thomas Way, ' of New York ".

(heraldry) Something added to a coat of arms, as a mark of honour; opposed to abatement.

Noun

(en noun)

A specific form or variation of something.

* {{quote-book, year=1963, author=(Margery Allingham)

, title=(The China Governess) , chapter=3 citation , passage=‘[…] There's every Staffordshire crime-piece ever made in this cabinet, and that's unique. The Van Hoyer Museum in New York hasn't that very rare second version of Maria Marten's Red Barn over there, nor the little Frederick George Manning—he was the criminal Dickens saw hanged on the roof of the gaol in Horsemonger Lane, by the way—’}}

* {{quote-magazine, date=2013-03

, author=Frank Fish, George Lauder , title=Not Just Going with the Flow , volume=101, issue=2, page=114 , magazine=(American Scientist) citation , passage=An extreme version of vorticity is a vortex . The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.}}

A translation from one language to another.

(obsolete) The act of translating, or rendering, from one language into another language.

An account or description from a particular point of view, especially as contrasted with another account.

(computing) A particular revision (of software, firmware, CPU, etc.).

(medicine) A condition of the uterus in which its axis is deflected from its normal position without being bent upon itself. See anteversion and retroversion.

(ophthalmology) An eye movement involving both eyes moving synchronously and symmetrically in the same direction.

(obsolete, or, medicine) A change of form, direction, etc.; transformation; conversion.

* Francis Bacon

The version of air into water.