Substitution may refer to:
Arts and media Substitution (poetry), a variation in poetic scansion Substitution (theatre), an acting methodology
Music Chord substitution, swapping one chord for a related one within a chord progression Tritone substitution, reinterpreting a chord via a new root note located an augmented fourth or diminished fifth distant from the root of the original interpretation "Substitution" (Silversun Pickups song), 2009 "Substitution" (Purple Disco Machine and Kungs song), 2023
Science and mathematics Biology and chemistry Base-pair substitution or point mutation, a type of mutation Substitution reaction, where a functional group in a chemical compound is replaced by another group Substituent, the atom or atoms that replaces those of the reactant Substitution, a process in which an allele arises and undergoes fixation
Mathematics and computing Substitution (algebra), replacing occurrences of some symbol by a given value Substitution (logic), a syntactic transformation on strings of symbols of a formal language String substitution, a mapping of letters in an alphabet to languages Substitution of a character in a string, one of the single-character edits used to define the Levenshtein distance Substitution cipher, a method of encryption Integration by substitution, a method for finding antiderivatives and integrals
Other uses in science Substitution (economics), switching between alternative consumable goods as their relative prices change Attribute substitution, a psychological process thought to underlie a number of cognitive biases and perceptual illusions Substitution method, a method of measuring the transmission loss of an optical fiber
Other uses Substitution (law), the replacement of a judge Substitution (sport), where a sports team is able to change one player for another during a match Substitution therapy or opiate replacement therapy Import substitution industrialization, a trade and economic policy Penal substitution, a theory of the atonement within Christian theology Simultaneous substitution, a practice requiring Canadian television distribution companies to substitute a non-local station signal with the local signal
Within Wikipedia Help:Substitution, help performing substitution on Wikipedia pages Special:ExpandTemplates, page that shows what will result from substitution Wikipedia:Substitution, where, when, how, and what about using substitution on Wikipedia
See also Substitute (disambiguation)