[see-kwuh ns]


verb (used with object), se·quenced, se·quenc·ing.

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 formsun·der·se·quence, nounun·se·quenced, adjective

Synonyms for sequence

1. See series. 2. arrangement. 4. outcome, sequel. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for sequence

Contemporary Examples of sequence

Historical Examples of sequence

  • More and more nervous, she was losing hold on the sequence of her facts.

    Tiverton Tales

    Alice Brown

  • The most natural thought to follow in sequence is: How like his own art!

    A Dish Of Orts

    George MacDonald

  • Poe's saying that a long poem is a sequence of short ones is perfectly just.

    The Lyric

    John Drinkwater

  • In unity of sequence, the effect of variety is best exemplified by the 9.

  • What has it to do with trains of reasoning, or with the sequence of events in time?

    Audrey Craven

    May Sinclair

British Dictionary definitions for sequence



an arrangement of two or more things in a successive order
the successive order of two or more thingschronological sequence
a sequentially ordered set of related things or ideas
an action or event that follows another or others
  1. cardsa set of three or more consecutive cards, usually of the same suit
  2. bridgea 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 (def. 4)

verb (tr)

to arrange in a sequence
biochem to determine the order of the units comprising (a protein, nucleic acid, genome, etc)

Word Origin for sequence

C14: from Medieval Latin sequentia that which follows, from Latin sequī to follow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for sequence

late 14c., "hymn sung after the Hallelujah and before the Gospel," from Old French sequence "answering verses" (13c.), from Medieval Latin sequentia "a following, a succession," from Latin sequentem (nominative sequens), present participle of sequi "to follow" (see sequel). In Church use, a partial loan-translation of Greek akolouthia, from akolouthos "following." General sense of "succession," also "a sequence at cards," appeared 1570s.


"arrange in a sequence," 1954, from sequence (n.). Related: Sequenced; sequencing.

Online Etymology Dictionary, © 2010 Douglas Harper

sequence in Medicine


[sēkwəns, -kwĕns′]


A following of one thing after another; succession.
An order of succession; an arrangement.
A related or continuous series.
The order of constituents in a polymer, especially the order of nucleotides in a nucleic acid or of the amino acids in a protein.


To organize or arrange in a sequence.
To determine the order of constituents in a polymer, such as a nucleic acid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

sequence in Science




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, 12, 13, 14, … 1n}. Also called progression
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.


To determine the order of subunits of a polymer.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.