In context|obsolete|lang=en terms the difference between policy and define
is that
policy is (obsolete) an illegal daily lottery in late nineteenth and early twentieth century usa on numbers drawn from a lottery wheel (
no plural ) while
define is (obsolete) to settle, decide (an argument etc).
As nouns the difference between policy and define
is that
policy is (obsolete) the art of governance; political science or
policy can be a contract of insurance while
define is (computing|programming) a kind of macro in source code that replaces one text string with another wherever it occurs.
As verbs the difference between policy and define
is that
policy is to regulate by laws; to reduce to order while
define is to determine with precision; to mark out with distinctness; to ascertain or exhibit clearly.