Something that may be substituted for another thing of the same type; spec. a replacement set of clothes. Frequently with of, indicating the type…

A person who carries out another's duties; a substitute. Obsolete.

One thing in place of another; esp. with reference to a medicine which is or may be substituted for another. Obsolete.

A substitute. With of. A thing used in place of another to serve the same purpose. Obsolete.

A thing which takes the place of another.

gen. An object, practice, action, etc., which takes the place of another; a replacement. Frequently with for (also of, †to).

One who acts in the place of another; a substitute or deputy. Also prefixed by Mr. as a form of address to a vice-chairman or vice-president.

= succedaneum, n.

figurative and gen. A person or (usually) a thing that acts for or takes the place of another; a substitute. Const. for, of. Also as the second…

Const. of. (rare.)

A thing which (rarely, a person who) replaces or serves in the place of another; a substitute.

A thing substituted for another. rare.

A person who or thing which supersedes another (in various senses of supersede, v.).

A person who or thing which supersedes another; = superseder, n.

In extended use. Something which (temporarily) takes the place of, or acts as a substitute for, another.

A thing that serves as a substitute for another. Cf. supply, v.1 9. Obsolete. rare.

A man who replaces or acts as a substitute for another; (in later use) esp. one who undertakes military service in place of another. Cf. remplaçante…

Something put in as a substitute or to fill a vacancy.

figurative.

More generally: a person who substitutes for or takes the place of another in a position, role, or job, usually temporarily; a replacement. Also in…

A person who puts something in place of another; (also in later use) an object used to perform this function.