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[see-kwuh ns] /ˈsi kwəns/
the following of one thing after another; succession.
order of succession:
a list of books in alphabetical sequence.
a continuous or connected series:
a sonnet sequence.
something that follows; a subsequent event; result; consequence.
Music. a melodic or harmonic pattern repeated three or more times at different pitches with or without modulation.
Liturgy. a hymn sometimes sung after the gradual and before the gospel; prose.
Movies. a series of related scenes or shots, as those taking place in one locale or at one time, that make up one episode of the film narrative.
Cards. a series of three or more cards following one another in order of value, especially of the same suit.
Genetics. the linear order of monomers in a polymer, as nucleotides in DNA or amino acids in a protein.
Mathematics. a set whose elements have an order similar to that of the positive integers; a map from the positive integers to a given set.
verb (used with object), sequenced, sequencing.
to place in a sequence.
Biochemistry. to determine the order of (chemical units in a polymer chain), especially nucleotides in DNA or RNA or amino acids in a protein.
Origin of sequence
1350-1400; Middle English < Late Latin sequentia, equivalent to sequ- (stem of sequī to follow) + -entia -ence
Related forms
undersequence, noun
unsequenced, adjective
1. See series. 2. arrangement. 4. outcome, sequel. Unabridged
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British Dictionary definitions for sequence


an arrangement of two or more things in a successive order
the successive order of two or more things: chronological sequence
a sequentially ordered set of related things or ideas
an action or event that follows another or others
  1. (cards) a set of three or more consecutive cards, usually of the same suit
  2. (bridge) a set of two or more consecutive cards
(music) an arrangement of notes or chords repeated several times at different pitches
  1. an ordered set of numbers or other mathematical entities in one-to-one correspondence with the integers 1 to n
  2. an ordered infinite set of mathematical entities in one-to-one correspondence with the natural numbers
a section of a film constituting a single continuous uninterrupted episode
(biochem) the unique order of amino acids in the polypeptide chain of a protein or of nucleotides in the polynucleotide chain of DNA or RNA
(RC Church) another word for prose (sense 4)
verb (transitive)
to arrange in a sequence
(biochem) to determine the order of the units comprising (a protein, nucleic acid, genome, etc)
Word Origin
C14: from Medieval Latin sequentia that which follows, from Latin sequī to follow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for sequence




Online Etymology Dictionary, © 2010 Douglas Harper
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sequence in Medicine

sequence se·quence (sē'kwəns, -kwěns')

  1. A following of one thing after another; succession.

  2. An order of succession; an arrangement.

  3. A related or continuous series.

  4. The order of constituents in a polymer, especially the order of nucleotides in a nucleic acid or of the amino acids in a protein.

v. se·quenced, se·quenc·ing, se·quenc·es
  1. To organize or arrange in a sequence.

  2. To determine the order of constituents in a polymer, such as a nucleic acid.

The American Heritage® Stedman's Medical Dictionary
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sequence in Science
  1. A set of quantities ordered in the same manner as the positive integers, in which there is always the same relation between each quantity and the one succeeding it. A sequence can be finite, such as {1, 3, 5, 7, 9}, or it can be infinite, such as {1, 1/2 , 1/3 , 1/4 , ... 1/n }. Also called progression.

  2. The order of subunits that make up a polymer, especially the order of nucleotides in a nucleic acid or of the amino acids in a protein.

Verb  To determine the order of subunits of a polymer.
The American Heritage® Science Dictionary
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