Noun

(uncountable) Doubt; the condition of being uncertain or without conviction.

*

, title=(The Celebrity), chapter=4 , passage=“Well,” I answered, at first with uncertainty , then with inspiration, “he would do splendidly to lead your cotillon, if you think of having one.” ¶ “So you do not dance, Mr. Crocker?” ¶ I was somewhat set back by her perspicuity.}}

* {{quote-news, year=2012, date=April 9, author=Mandeep Sanghera, work=BBC Sport

, title= Tottenham 1-2 Norwich , passage=After spending so much of the season looking upwards, the swashbuckling style and swagger of early season Spurs was replaced by uncertainty and frustration against a Norwich side who had the quality and verve to take advantage}}

(countable) Something uncertain or ambiguous.

(uncountable, mathematics) A parameter that measures the dispersion of a range of measured values.

Noun

(en-noun)

(obsolete) A vast chasm or abyss.

The unordered state of matter in classical accounts of cosmogony

Any state of disorder, any confused or amorphous mixture or conglomeration.

*

(obsolete, rare) A given medium; a space in which something exists or lives; an environment.

*, II.ii.3:

What is the centre of the earth? is it pure element only, as Aristotle decrees, inhabited (as Paracelsus thinks) with creatures whose chaos is the earth: or with fairies, as the woods and waters (according to him) are with nymphs, or as the air with spirits?

(mathematics) Behaviour of iterative non-linear systems in which arbitrarily small variations in initial conditions become magnified over time.

(fantasy) One of the two metaphysical forces of the world in some fantasy settings, as opposed to law.