a person, especially a young one, endowed with exceptional qualities or abilities

a first, typical, or preliminary model of something, especially a machine, from which other forms are developed or copied

a typical example or pattern of something; a model

the central point of something, typically a difficult or unpleasant situation

skill or expertise in a particular activity or field

attempt to sell something, typically by pestering people in an aggressive or bold manner

sharpness or keenness of thought, vision, or hearing

in every case or on every occasion; always

someone who supports a particular party, person, or set of ideas