expert(n = noun.person) - a person with special knowledge or ability who performs skillfully;
is a kind of individual, mortal, person, somebody, someone, soul
has particulars: ace, adept, champion, genius, hotshot, maven, mavin, sensation, star, superstar, virtuoso, whiz, whizz, wiz, wizard, agronomist, all-rounder, all arounder, analyst, analyst, anatomist, antiquarian, antiquary, archaist, arbiter, supreme authority, archer, bowman, authority, black belt, cabalist, kabbalist, calculator, computer, estimator, figurer, reckoner, climatologist, computer expert, computer guru, cosmetologist, efficiency engineer, efficiency expert, exegete, genealogist, geographer, horticulturist, plantsman, investigator, jurist, legal expert, lapidarist, lapidary, logician, logistician, mnemonist, mythologist, nerd, commentator, observer, out-and-outer, parliamentarian, past master, prosthetist, pteridologist, guide, pathfinder, scout, shark, shooter, shot, specialiser, specialist, specializer, talent, technician, technocrat, healer, therapist, old-timer, old hand, old stager, oldtimer, stager, veteran, warhorse

1.  expert(s = adj.all) adept, good, practiced, proficient, skilful, skillful - having or showing knowledge and skill and aptitude; "adept in handicrafts"; "an adept juggler"; "an expert job"; "a good mechanic"; "a practiced marksman"; "a proficient engineer"; "a lesser-known but no less skillful composer"; "the effect was achieved by skillful retouching"
Derived form noun expertness₁

2.  expert(s = adj.all) technical - of or relating to or requiring special knowledge to be understood; "technical terminology"; "a technical report"; "technical language"
Derived form noun expertise₁

   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. [1913 Webster]
"A valiant and most expert gentleman." [1913 Webster]
"What practice, howsoe'er expert
In fitting aptest words to things . . .
Hath power to give thee as thou wert?"

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. [1913 Webster]

2.  A specialist in a particular profession or department of science requiring for its mastery peculiar culture and erudition. [1913 Webster]
" Such specialists may be witnesses in matters as to which ordinary observers could not without such aid form just conclusions, and are liable for negligence in case they injure another from want of proper qualifications or proper care in the exercise of their specialty."

   To experience. [1913 Webster]
"Die would we daily, once it to expert." [1913 Webster]

expert, adj. & n.
--adj.
1 (often foll. by at, in) having special knowledge or skill in a subject.
2 involving or resulting from this (expert evidence; an expert piece of work).
--n. (often foll. by at, in) a person having special knowledge or skill.

Derivative:
expertly adv. expertness n.

Etymology:
ME f. OF f. L expertus past part. of experiri: see EXPERIENCE

N  skill, skillfulness, address, dexterity, dexterousness, adroitness, expertness, proficiency, competence, technical competence, craft, callidity, facility, knack, trick, sleight, mastery, mastership, excellence, panurgy, ambidexterity, ambidextrousness, sleight of hand, seamanship, airmanship, marksmanship, horsemanship, rope-dancing, accomplishment, acquirement, attainment, art, science, technicality, technology, practical knowledge, technical knowledge, knowledge of the world, world wisdom, savoir faire, tact, mother wit, discretion, finesse, craftiness, management, self-help, cleverness, talent, ability, ingenuity, capacity, parts, talents, faculty, endowment, forte, turn, gift, genius, intelligence, sharpness, readiness, invention, aptness, aptitude, turn for, capacity for, genius for, felicity, capability, curiosa felicitas, qualification, habilitation, proficient, masterpiece, coup de maitre, chef d'euvre, tour de force, good stroke, skillful, dexterous, adroit, expert, apt, handy, quick, deft, ready, gain, slick, smart, proficient, good at, up to, at home in, master of, a good hand at, au fait, thoroughbred, masterly, crack, accomplished, conversant, experienced, practiced, skilled, hackneyed, up in, well up in, in practice, in proper cue, competent, efficient, qualified, capable, fitted, fit for, up to the mark, trained, initiated, prepared, primed, finished, clever, cute, able, ingenious, felicitous, gifted, talented, endowed, inventive, shrewd, sharp, on the ball, cunning, alive to, up to snuff, not to be caught with chaff, discreet, neat-handed, fine-fingered, nimble-fingered, ambidextrous, sure- footed, cut out for, fitted for, technical, artistic, scientific, daedalian, shipshape, workman- like, business-like, statesman-like, skillfully, well, artistically, with skill, with consummate skill, secundum artem, suo Marte, to the best of one's abilities, ars celare artem, artes honorabit, celui qui veut celui-la peut, c'est une grande habilite que de savoir cacher son, expertus metuit, es bildet ein Talent sich in der Stille sich ein C, heart to conceive, the understanding to direct, or the hand to execute, if you have lemons, make lemonade.

N  proficient, expert, adept, dab, dabster, crackerjack, connoisseur, master, master hand, prima donna, first fiddle, top gun, chef de cuisine, top sawyer, protagonist, past master, mahatma, picked man, medallist, prizeman, veteran, old stager, old campaigner, old soldier, old file, old hand, man of business, man of the world, nice hand, good hand, clean hand, practiced hand, experienced eye, experienced hand, marksman, good shot, dead shot, crack shot, ropedancer, funambulist, acrobat, cunning man, conjuror, wizard, genius, mastermind, master head, master spirit, cunning blade, sharp blade, sharp fellow, jobber, cracksman, politician, tactician, strategist, pantologist, admirable Crichton, Jack of all trades, prodigy of learning.

N  sage, wise man, genius, master mind, master spirit of the age, longhead, thinker, intellectual, longhair, authority, oracle, luminary, shining light, esprit fort, magnus Apollo, Solon, Solomon, Nestor, Magi, second Daniel, man of learning, expert, wizard, wiseacre, bigwig, know-it-all, poor man's Einstein, venerable, reverenced, emeritus, barba tenus sapientes.

computer expert, economic expert, efficiency expert, escape expert, expert witness, fingerprint expert, handwriting expert, legal expert, like an expert, macroeconomic expert, microeconomic expert