[lur-nid for 1–3; lurnd for 4]
having much knowledge; scholarly; erudite: learned professors.
connected or involved with the pursuit of knowledge, especially of a scholarly nature: a learned journal.
of or showing learning or knowledge; well-informed: learned in the ways of the world.
acquired by experience, study, etc.: learned behavior.

1300–50; Middle English lerned. See learn, -ed2

learnedly, adverb
learnedness, noun
half-learned, adjective
half-learnedly, adverb
overlearned, adjective
overlearnedly, adverb
overlearnedness, noun
well-learned, adjective
Dictionary.com Unabridged


verb (used with object), learned [lurnd] or learnt, learning.
to acquire knowledge of or skill in by study, instruction, or experience: to learn French; to learn to ski.
to become informed of or acquainted with; ascertain: to learn the truth.
to memorize: He learned the poem so he could recite it at the dinner.
to gain (a habit, mannerism, etc.) by experience, exposure to example, or the like; acquire: She learned patience from her father.
(of a device or machine, especially a computer) to perform an analogue of human learning with artificial intelligence.
Nonstandard. to instruct in; teach.
verb (used without object), learned [lurnd] or learnt, learning.
to acquire knowledge or skill: to learn rapidly.
to become informed (usually followed by of ): to learn of an accident.

before 900; Middle English lernen, Old English leornian to learn, read, ponder (cognate with German lernen); akin to lesan to glean (cognate with German lesen to read). See lear

learnable, adjective
mislearn, verb, mislearned or mislearnt, mislearning.
outlearn, verb (used with object), outlearned or outlearnt, outlearning.
relearn, verb, relearned or relearnt, relearning.

learn, teach.

1. Learn, ascertain, detect, discover imply adding to one's store of facts. To learn is to add to one's knowledge or information: to learn a language. To ascertain is to verify facts by inquiry or analysis: to ascertain the truth about an event. To detect implies becoming aware of something that had been obscure, secret, or concealed: to detect a flaw in reasoning. To discover is used with objective clauses as a synonym of learn in order to suggest that the new information acquired is surprising to the learner: I discovered that she had been married before.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
learn (lɜːn)
vb , learns, learning, learned, learnt
1.  (when tr, may take a clause as object) to gain knowledge of (something) or acquire skill in (some art or practice)
2.  (tr) to commit to memory
3.  (tr) to gain by experience, example, etc
4.  (intr; often foll by of or about) to become informed; know
5.  not standard to teach
[Old English leornian; related to Old High German lirnen]

learned (ˈlɜːnɪd)
1.  having great knowledge or erudition
2.  involving or characterized by scholarship
3.  (prenominal) a title applied in referring to a member of the legal profession, esp to a barrister: my learned friend

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

O.E. leornian "to get knowledge, be cultivated," from P.Gmc. *liznojan (cf. O.Fris. lernia, O.H.G. lernen, Ger. lernen "to learn," Goth. lais "I know), with a base sense of "to follow or find the track," from PIE *leis- "track." Related to Ger. Gleis "track," and to O.E. læst "sole of the foot"
(see last (n.)). The transitive sense (He learned me how to read), now vulgar, was acceptable from c.1200 until early 19c., from O.E. læran "to teach" (cf. M.E. lere, Ger. lehren "to teach;" see lore), and is preserved in the adj. learned "having knowledge gained by study" (c.1340).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Here are some lessons learned from the eruption disruptions, which are
  particularly relevant for anyone traveling abroad.
Most of us learned from a previous generation of lecturers, and many students
  are still learning from lectures.
But now researchers have learned that the drug also causes more neurons to form
  than normally would.
We have learned much about various teaching methods, the brain, and made
  education mandatory.
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