Instance and Casing

instance

An occurrence of something.
- usage: "it was a case of bad judgment"; "another instance occurred yesterday"; "but there is always the famous example of the Smiths"
- synonyms: case, example
An item of information that is typical of a class or group.
- usage: "this patient provides a typical example of the syndrome"; "there is an example on page 10"
- synonyms: example, illustration, representative

(n.) That which is instant or urgent; motive.
(n.) That which offers itself or is offered as an illustrative case; something cited in proof or exemplification; a case occurring; an example.
(n.) Occasion; order of occurrence.
(n.) The act or quality of being instant or pressing; urgency; solicitation; application; suggestion; motion.
(v.t.) To mention as a case or example; to refer to; to cite; as, to instance a fact.
(n.) A token; a sign; a symptom or indication.
(v.i.) To give an example.

Webster's Revised Unabridged Dictionary

casing

The housing or outer covering of something.
- usage: "the clock has a walnut case"
- synonyms: shell, case
The outermost covering of a pneumatic tire.
The enclosing frame around a door or window opening.
- usage: "the casings had rotted away and had to be replaced"
- synonyms: case

Look over, usually with the intention to rob.
- usage: "They men cased the housed"
- synonyms: case
Enclose in, or as if in, a case.
- usage: "my feet were encased in mud"
- synonyms: encase, incase, case

(p.pr.&vb.n.) of Cash.
(p.pr.&vb.n.) of Case.
(n.) An inclosing frame; especially the framework around a door or a window. See Case, n., 4.
(n.) The act or process of inclosing in or covering with, a case or thin substance, as plaster, boards, etc.
(n.) An outside covering, for protection or ornament or to precent the radiation of heat.

Webster's Revised Unabridged Dictionary