1. Not characteristic of or befitting a profession or one engaged in a profession
   "described in unprofessional language so that high school students could understand it"; "was censured for unprofessional conduct"; "unprofessional repairs"

See also: amateur, amateurish, inexpert, unskilled

Antonym: professional

• first battle of Ypres
• first blush
• first cause
• First Council of Constantinople
• First Council of Lyons
• First Council of Nicaea
• first cousin
• first cranial nerve
• First Crusade
• first degree
• first derivative
• First Duke of Marlborough
• First Duke of Wellington
• First Earl Kitchener of Khartoum
• First Earl of Beaconsfield
• First Earl of Chatham
• First Earl of Orford
• First Earl Wavell
• First Epistle of John
• First Epistle of Paul the Apostle to the Corinthians
• First Epistle of Paul the Apostle to the Thessalonians
• First Epistle of Paul the Apostle to Timothy
• First Epistle of Peter
• First Epistle to the Corinthians
• First Epistle to the Thessalonians