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[noun, verb ek-spurt; adjective ek-spurt, ik-spurt]


1. a person who has special skill or knowledge in some particular field; specialist;      authority:

2. possessing special skill or knowledge; train by practice; skillful or skilled (often followed by in or at):

3. ​to act as an expert for.

a coach, athletic trainer, dietitian, personal trainer, nutritionist, physical therapist, instructor, physician, etc.


an expert instructor; to be expert at programming custom plans.

verb (used with object)