• synonyms

L, l

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noun, plural L's or Ls, l's or ls.
  1. the 12th letter of the English alphabet, a consonant.
  2. any spoken sound represented by the letter L or l, as in let, dull, cradle.
  3. something having the shape of an L.
  4. a written or printed representation of the letter L or l.
  5. a device, as a printer's type, for reproducing the letter L or l.


  1. large.
  2. liter; liters.


noun, plural L's or Ls.
  1. ell1.


noun, plural L's or Ls. Informal.
  1. an elevated railroad.


  1. the 12th in order or in a series, or, if I is omitted, the 11th.
  2. (sometimes lowercase) the Roman numeral for 50.Compare Roman numerals.
  3. Electricity. inductance.
  4. Physics. kinetic potential.
  5. Biochemistry. leucine.
  6. Economics. a broad measure of total U.S. liquid assets, issued periodically by the Federal Reserve Board.Compare M


  1. British. pound; pounds.

Origin of L1

From the Latin word lībra


  1. lambert; lamberts.
  2. language.
  3. large.
  4. Latin.
  5. left.
  6. length.
  7. long: denoting a size longer than regular, especially for suits and coats made for tall men: 40L.
  8. longitude.
  9. Theater. stage left.


Symbol, Optics, Chemistry, Biochemistry.
  1. levorotatory; levo- (distinguished from d-).
Compare l-.


  1. Chemistry. levo-.
  2. U.S. Military. (in designations of light aircraft) liaison: L-15.


  1. large.
  2. latitude.
  3. law.
  4. leaf.
  5. league.
  6. left.
  7. length.
  8. plural ll., line.
  9. link.
  10. (in Italy) lira; lire.
  11. liter; liters.
  12. long.


Symbol, Biochemistry.
  1. (of a molecule) having a configuration resembling the levorotatory isomer of glyceraldehyde: printed as a small capital, roman character (distinguished from d-).
Compare l-.


  1. book.

Origin of L.1

From the Latin word liber


  1. place.

Origin of L.2

From the Latin word locus


  1. Lady.
  2. Lake.
  3. large.
  4. Latin.
  5. latitude.
  6. law.
  7. left.
  8. lempira; lempiras.
  9. leu; lei.
  10. lev; leva.
  11. Liberal.
  12. (in Italy) lira; lire.
  13. Lord.
  14. Low.
  15. lumen.
  16. Theater. stage left.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for l

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British Dictionary definitions for l



noun plural l's, L's or Ls
  1. the 12th letter and ninth consonant of the modern English alphabet
  2. a speech sound represented by this letter, usually a lateral, as in label
    1. something shaped like an L
    2. (in combination)an L-shaped room


symbol for
  1. litre
  2. physics lepton number


symbol for
  1. ell (unit)
  2. lambert(s)
  3. large
  4. Latin
  5. (on British motor vehicles) learner driver
  6. physics length
  7. live
  8. currency
    1. poundUsually written: £
    2. lempira
    3. lek
    4. leu
    5. lire
  9. aeronautics lift
  10. electronics inductor (in circuit diagrams)
  11. physics latent heat
  12. physics self-inductance
  13. chem the Avogadro constant
  14. (Roman numeral) 50See Roman numerals
abbreviation for
  1. Luxembourg (international car registration)

Word Origin

(for sense 8a) Latin libra pound



abbreviation for
  1. lake
  2. left
  3. length
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 l


Roman letter, from Greek lambda, from Semitic lamed. The shape of the Roman letter is an early one in Greek, adopted before it was superseded in Greek by the inverted form which became the Greek lambda.

Online Etymology Dictionary, © 2010 Douglas Harper

l in Medicine


  1. left
  2. limes (used with a lower case letter or a plus sign, or used with a subscript letter or plus sign as a symbol for various doses of toxin)
  3. or l liter


  1. Relating to the configuration of l-glyceraldehyde, a compound chosen as the basis for stereochemical nomenclature because it is the simplest carbohydrate that can form optical isomers:l-lactic acid.


  1. To the left; levo:l-lactic acid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

l in Science


  1. Abbreviation of length, liter
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.