Dictionary:

generalist

  (jĕn'ər-ə-lĭst)

One who has broad general knowledge and skills in several areas.

Person with many abilities and interests or whose job description contains many varied duties. Contrasts with Specialist.

A physician whose practice is not oriented in a specific medical specialty but instead covers a variety of medical problems.

The noun has one meaning:

Meaning #1: a modern scholar who is in a position to acquire more than superficial knowledge about many different interests
  Synonym: Renaissance man
  Antonym: specialist (meaning #1)