utilitarian

nouns

someone who believes that the value of a thing depends on its utility
is a type of (narrower)
a philosopher who specializes in morals and moral problems

adjectives

having a useful function
"utilitarian steel tables"
is derived from
having utility often to the exclusion of values
"plain utilitarian kitchenware"
is derived from
is similar to
being of use or service
"the girl felt motherly and useful"; "a useful job"; "a useful member of society"