Substitute may mean:
In General English Usage:
To replace one thing with another
A person who replaces an exiting competitor during the course of a game, as permitted by the laws of the game. Such replacements are generally made for tactical reasons, or when a player becomes tired or injured.
- A substitute teacher, a temporary replacement that takes over in a teacher's absence.
- Substitute character, the hexadecimal code number 0x1A in the ASCII character set.
- Substitution property of equality, an operation used in mathematics.
- Substitute good, a classification of goods or services in economic theory.
- "Substitute" (The Who song), a 1966 single by The Who
- "Substitute" (Righteous Brothers song), a 1975 song by The Righteous Brothers, a hit for Clout in 1978
- Substitution (law), a legal right to change a judge that may be biased.
- Substitute flag, part of the international maritime signal flag set
- Substitute chord, an alternative chord used in jazz harmony