Someone experienced has first-hand knowledge of something. A 10-year veteran is an experienced baseball player.

Experience is time you spend doing or learning something. If you've had a job as a welder, you have welding experience. When someone is described as experienced, it means they have first-hand knowledge about something. An experienced teacher has been teaching for years. An experienced writer has written many books or articles. An experienced soldier has been in the field for a while. People who are experienced tend to be wise: they know what they're talking about.

Definitions of experienced

adj having experience; having knowledge or skill from observation or participation

full-fledged, fully fledged
(of persons, e.g.) having gained full status
intimate, knowledgeable, versed
thoroughly acquainted through study or experience
old, older
skilled through long experience
practiced, practised
skillful after much practice
seasoned, veteran
rendered competent through trial and experience
having or showing or requiring special skill
tough, toughened
physically toughened
inexperienced, inexperient
lacking practical experience or training
callow, fledgling, unfledged
young and inexperienced
new, raw
lacking training or experience
naive, uninitiate, uninitiated
not initiated; deficient in relevant experience
unpracticed, unpractised, unversed
not having had extensive practice
unseasoned, untested, untried, young
not tried or tested by experience
not having or showing or requiring special skill or proficiency
naif, naive
marked by or showing unaffected simplicity and lack of guile or worldly experience
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