Adjective

(en adjective)

Not formal or ceremonious.

*, chapter=3

, title= The Mirror and the Lamp , passage=One saint's day in mid-term a certain newly appointed suffragan-bishop came to the school chapel, and there preached on “The Inner Life.”  He at once secured attention by his informal method, and when presently the coughing of Jarvis […] interrupted the sermon, he altogether captivated his audience with a remark about cough lozenges being cheap and easily procurable.}}

Not in accord with the usual regulations.

Suited for everyday use.

(of language) Reflecting everyday, non-ceremonious usage.

(gardening) Not organized; not structured or planned.