learned

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Having profound, often systematic knowledge; erudite.
• adjective Showing or characterized by such knowledge.
• adjective Acquired by learning or experience.

from The Century Dictionary.

• Possessed of the learning of schools; well furnished with literary and scientific knowledge; erudite: as, a learned man.
• Well acquainted; having much experience; skilful: often with in: as, learned in art.
• Pertaining to or manifesting learning; exhibiting the effect of instruction or learning; scholastic: as, learned accomplishments; a learned treatise.
• Synonyms and Learned, Scholarly, erudite, deep read. These words agree in representing the possession of a knowledge obtained by careful and protracted study, especially in books. They differ in that learned expresses depth and fullness in the knowledge, while scholarly expresses accuracy: as, a learned and scholarly treatise upon the use of the dative case. Learned expresses only the result of study; scholarly may express the result or the spirit: as, scholarly tastes. See ignorant.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Of or pertaining to learning; possessing, or characterized by, learning, esp. scholastic learning; erudite; well-informed
• adjective learned men; men of erudition; scholars.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb Simple past tense and past participle of learn: taught
• adjective Having much learning, knowledgeable, erudite; highly educated.
• verb Simple past tense and past participle of learn.
• adjective Derived from experience; acquired by learning.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective having or showing profound knowledge
• adjective established by conditioning or learning
• adjective highly educated; having extensive information or understanding