WordReference Random House Unabridged Dictionary of American English © 2017
bis1  (bis),USA pronunciation adv. 
  1. twice.
  2. again (used interjectionally as an enthusiastic call for the repetition of a musical performance).
  • Latin; Old Latin duis twice
  • Italian
  • 1810–20

bis2  (bis),USA pronunciation n. 
  1. Clothinga sheer, often embroidered linen, used in the manufacture of altar cloths.
Also,  bisso. 
  • Latin byssus byssus
  • Middle English 1350–1400

  1. Bank for International Settlements.
  2. British Information Services.

WordReference Random House Learner's Dictionary of American English © 2017
bi /baɪ/USA pronunciation   adj., n. [countable], pl.
  1. Slang Termsbis, bi's. Slang. bisexual.

bi-,1  prefix. 
  1. bi- comes from Latin, where it has the meaning "twice, two.'' This meaning is found in such words as: bicentennial, biennial, bigamy, bilateral, binoculars, bipartisan, biped, bisect, biweekly.
    In some words, esp. words referring to time periods, the prefix bi- has two meanings: "twice a + ~'' and "every two + ~-s''. Thus, biannual means both "twice a year'' and "every two years.'' Be careful;
    check many of these words.

bi-2 ,
WordReference Random House Unabridged Dictionary of American English © 2017
bi  (bī),USA pronunciation adj., n., pl.  bis, bi's. 
  1. Slang Termsbisexual.
  • by shortening

BI ,pl.  BI's. 
  1. built-in.

Bi ,[Symbol, Chem.]
  1. Chemistrybismuth.

bi-1 ,
  • a combining form meaning "twice,'' "two,'' used in the formation of compound words:bifacial; bifarious.Cf.  bin-. 
    • Latin, combining form of bis; see twice
      All words except biennial referring to periods of time and prefixed by bi-1 are potentially ambiguous. Since bi- can be taken to mean either "twice each'' or "every two,'' a word like biweekly can be understood as "twice each week'' or "every two weeks.'' To avoid confusion, it is better to use the prefix semi- to mean "twice each'' (semiannual;
      ) or the phrase twice a or twice each (twice a month;
      twice a week;
      twice each year
      ), and for the other sense to use the phrase every two (every two months;
      every two weeks;
      every two years

    bi-2 ,
  • var. of  bio-, esp. before a vowel:biopsy.

  • Collins Concise English Dictionary © HarperCollins Publishers::

    bis /bɪs/ adv
    1. twice; for a second time (used in musical scores to indicate a part to be repeated)
    sentence substitute
    1. encore! again!
    Etymology: 19th Century: via Italian from Latin, from Old Latin duis

    'BIS' also found in these entries:

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