casually

adjective

1. happening by chance; fortuitous: a casual meeting.
2. without definite or serious intention; careless or offhand; passing: a casual remark.
3. seeming or tending to be indifferent to what is happening; apathetic; unconcerned: a casual, nonchalant air.
4. without emotional intimacy or commitment: casual sex.
5. appropriate for wear or use on informal occasions; not dressy: casual clothes; casual wear.
6. irregular; occasional: a casual visitor.
7. accidental: a casual mishap.
8. noting or relating to video games that do not require much skill or time commitment, or noting a player of such games: casual gamers.Compare hard-core(def 6).
9. Obsolete. uncertain.

noun

10. a worker employed only irregularly.
11. a soldier temporarily at a station or other place of duty, and usually en route to another station.
12. Usually Disparaging. a person who plays video games that do not require much skill or time commitment.

adjective

1. happening by accident or chancea casual meeting
2. offhand; not premeditateda casual remark
3. shallow or superficiala casual affair
4. being or seeming unconcerned or apathetiche assumed a casual attitude
5. (esp of dress) for informal weara casual coat
6. occasional or irregularcasual visits; a casual labourer
7. biology another term for adventive

noun

8. (usually plural) an informal article of clothing or footwear
9. an occasional worker
10. biology another term for an adventive
11. (usually plural) a young man dressed in expensive casual clothes who goes to football matches in order to start fights

adj.

late 14c., “subject to or produced by chance,” from Middle French casuel (15c.), from Late Latin casualis “by chance,” from Latin casus “chance, occasion, opportunity; accident, event” (see case (n.1)).

Of persons, in the sense of “not to be depended on, unmethodical,” it is attested from 1883; meaning “showing lack of interest” is from 1916. Of clothes, “informal,” from 1939. Related: Casually.