eval /ˈiːvəl/adjective 1verb 1noun 1forms 5 adjective1 •(no longer used) Relating to time or duration. verb1 •To evaluate (or execute) source code held in a string during run time.Of course, it's quite pointless to eval a piece of code that you know at compile time ... — 1997 noun1 •Abbreviation of evaluation.Scans are unable to determine subject's [Gandrayda's] age, but psych eval suggests a high degree of youthfulness. — 2007 formsevaled · evalled · evaling · evalling · evals