from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A person with a high degree of skill in or knowledge of a certain subject.
- n. The highest grade that can be achieved in marksmanship.
- n. A person who has achieved this grade.
- adj. Having, involving, or demonstrating great skill, dexterity, or knowledge as the result of experience or training. See Synonyms at proficient.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Extraordinarily capable or knowledgeable.
- adj. Characteristic of an expert.
- n. A person with extensive knowledge or ability in a given subject.
- n. A player ranking just below master.
from the GNU version of the Collaborative International Dictionary of English
- adj. Taught by use, practice, or experience, experienced; having facility of operation or performance from practice; knowing and ready from much practice; clever; skillful
- n. An expert or experienced person; one instructed by experience; one who has skill, experience, or extensive knowledge in his calling or in any special branch of learning.
- n. A specialist in a particular profession or department of science requiring for its mastery peculiar culture and erudition.
- n. A sworn appraiser.
- transitive v. To experience.
from The Century Dictionary and Cyclopedia
- Having had experience; experienced; practised; trained; taught by use, practice, or experience.
- Skilful; dexterous; adroit; having facility acquired by practice.
- Pertaining to or resulting from experience; due to or proceeding from one having practical knowledge or skill: as, expert workmanship; expert testimony.
- Synonyms Adroit, Dexterous, Expert, etc. (see adroit); trained, practised. See skilful.
- n. An experienced, skilful, or practised person; one skilled or thoroughly informed in any particular department of knowledge or art.
- n. In law, a person who, by virtue of special acquired knowledge or experience on a subject, presumably not within the knowledge of men generally, may testify in a court of justice to matters of opinion thereon, as distinguished from ordinary witnesses, who can in general testify only to facts.
- To experience.
- [⟨ expert, n.] To examine (books, accounts, etc.) as an expert; have examined by an expert: as, the accounts have been experted.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a person with special knowledge or ability who performs skillfully
- adj. of or relating to or requiring special knowledge to be understood
- adj. having or showing knowledge and skill and aptitude
Middle English, from Old French, experienced, from Latin expertus, past participle of experīrī, to try; see per-3 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin expertus. (Wiktionary)