Expert

Part of speech: noun (n.)

1. 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.

2. A specialist in a particular profession or department of science requiring for its mastery peculiar culture and erudition.

3. A sworn appraiser.

Part of speech: verb (v.)

To experience. [Obs.] Die would we daily, once it to expert. Spencer.

Part of speech: adjective (a.)

Taught by use, practice, or experience, experienced; having facility of operation or performance from practice; knowing and ready from much practice; clever; skillful; as, an expert surgeon; expert in chess or archery. A valiant and most expert gentleman. Shak. What practice, howsoe'er expert In fitting aptest words to things . . . Hath power to give thee as thou wert Tennison.

Synonyms: Adroit; dexterous; clever; ready; prompt.