KJV Dictionary Definition: expert
EXPERT', a. L. expertus, from experior, to try. See Experience.
1. Properly, experienced; taught by use, practice or experience; hence, skillful; well instructed; having familiar knowledge of; as an expert philosopher.
2. Dextrous; adroit; ready; prompt; having a facility of operation or performance from practice; as an expert operator in surgery. It is usually followed by in; as expert in surgery; expert in performance on a musical instrument. Pope uses expert of arms, but improperly.
EXPERT'NESS, n. Skill derived from practice; readiness; dexterity; adroitness; as expertness in musical performance; expertness in war or in seamanship; expertness in reasoning.