Definition of dilettante:

an amateur who engages in an activity without serious intentions and who pretends to have knowledge

Synonyms of dilettante:

dabbler, sciolist, nonprofessional, dilettantish, trifler, connoisseur, amateur

Opposite/Antonyms of dilettante:

professional, well-rounded, expert, pedant, maven, profound, practitioner

Sentence/Example of dilettante:

Data is what distinguishes the dilettante from the artist.