specialize (Verb) — Become more focus on an area of activity or field of study. ex. "She specializes in Near Eastern history"
specialize (Verb) — Be specific about.
specialize (Verb) — Suit to a special purpose. ex. "specialize one's research" ex. "this kind of beak has become specialized in certain Galapagos finches"
specialize (Verb) — Devote oneself to a special area of work. ex. "She specializes in honey bees" ex. "This baker specializes in French bread"
specialize (Verb) — Evolve so as to lead to a new species or develop in a way most suited to the environment.