Definitions of scientist on the Web:
A person who has studied science, especially one who is active in a particular field of investigation.

a person who uses observation, experimentation and theory to learn about a subject (Biologists, physicists, chemists, geologists and astronomers are all scientists.)

a person that knows a great deal about a branch of science. An ornithologist is a scientist that specializes in the study of birds.

were a 1980s jazz/funk/fusion group from Denmark. Perhaps their only memorable hit was "Pip pip pip", which reached number 17 in the Danish charts in Easter week, 1981.

a person with advanced knowledge of one or more sciences