having personal knowledge as a result of study, experience, etc.; informed (usually followed by with ): to be acquainted with law.
brought into social contact; made familiar: people acquainted through mutual friends.

1250–1300; Middle English; see acquaint, -ed2

acquaintedness, noun
half-acquainted, adjective
quasi-acquainted, adjective
unacquainted, adjective
well-acquainted, adjective Unabridged


verb (used with object)
to make more or less familiar, aware, or conversant (usually followed by with ): to acquaint the mayor with our plan.
to furnish with knowledge; inform (usually followed by with ): to acquaint the manager with one's findings.
to bring into social contact; introduce (usually followed by with ): She acquainted her roommate with my cousin.

1250–1300; Middle English aqueinten, acointen < Anglo-French acointer, Old French acoint(i)er, verbal derivative of acointe familiar, known < Latin accognitus, past participle of accognōscere to recognize, equivalent to ac- ac- + co- co- + gni- know + -tus past participle suffix

preacquaint, verb (used with object)
reacquaint, verb (used with object) Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
acquaint (əˈkweɪnt)
vb (foll by with or of)
1.  to make (a person) familiar or conversant (with); inform (of)
2.  chiefly (US) (foll by with) to introduce (to); bring into contact (with)
[C13: via Old French and Medieval Latin from Latin accognitus, from accognōscere to know perfectly, from ad- (intensive) + cognōscere to know]

acquainted (əˈkweɪntɪd)
1.  (sometimes foll by with) on terms of familiarity but not intimacy
2.  (foll by with) having knowledge or experience (of); familiar (with)

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1300, from O.Fr. acointier from V.L. *accognitare "to make known," from L. accognitus, pp. of accognoscere "know well," from ad- "to" + cognitus, pp. of cogniscere "come to know," from com- "with" + gnoscere "know" (see notice). Originally reflective, "to make oneself known;"
sense of "to gain for oneself personal knowledge of" is from early 14c.

early 14c., "personally known;" see acquaint. Of skills, situations, etc., from late 15c.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Our hosts had invited a clutch of exchange students and their American
  “parents” for a get-acquainted dinner.
Whoever wrote the captions seems not to be acquainted with the differences
  between the two generations of Sony hardware.
I'm not acquainted with all the new stuff.
And below are some other publications which will help you get acquainted with
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