random

Having no specific pattern, purpose, or objective: synonym: chance.

Of or relating to a type of circumstance or event that is described by a probability distribution.

Of or relating to an event in which all outcomes are equally likely, as in the testing of a blood sample for the presence of a substance.

(at random) Without a governing design, method, or purpose; unsystematically.

In mining, the direction of a rake-vein.

A rushing, as of a torrent; an impetuous course; impetuosity; violence; force: especially with great, as in the phrase a great random, with great speed or force.

A rush; spurt; gush.

A continuous flow of words; a harangue.

An indeterminate course or proceeding; hence, lack of direction, rule, or method; haphazard; chance: used only in the phrase at random—that is, in a haphazard, aimless, and purely fortuitous manner.

The distance traversed by a missile; range; reach.