utile /ˈjuː.taɪl/adjective 1noun 1forms 3 adjective1 •(no longer used) Useful. noun1 •A theoretical unit of measure of utility, for indicating a supposed quantity of satisfaction derived from an economic transaction.Rational agents always maximize the number of utiles procured; that is, they will always choose those outcomes which promise to produce the most utiles. — 2002 formsutiles · more utile · most utile