clas‧si‧fy past tense and past participle classified, present participle classifying, third person singular classifies [transitive]
to decide what group something belongs to [↪ classification]
classify something as/under something
In law, beer is classified as a food product.
We'd classify Drabble's novels under 'Romance'.
Families are classified according to the father's occupation.
to regard people or things as belonging to a particular group because they have similar qualities [↪ classification]:
As a musician, Cage is hard to classify.