Substitute may mean:

In General English Usage:

To replace one thing with another

In sport:

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.

Examples include:

• Football (soccer) - see Substitute (football)
• Cricket - see Substitute (cricket)
• Interchange (Australian rules football), in Australian Rules Football

Other uses:

• 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

See also

• Substitution