legal: adj. Loosely used to mean `in accordance with all the
relevant rules', esp. in connection with some set of constraints
defined by software. "The older =+ alternate for += is no longer
legal syntax in ANSI C." "This parser processes each line of legal
input the moment it sees the trailing linefeed." Hackers often
model their work as a sort of game played with the environment in
which the objective is to maneuver through the thicket of `natural
laws' to achieve a desired objective. Their use of `legal' is
flavored as much by this game-playing sense as by the more
conventional one having to do with courts and lawyers. Compare
language lawyer, legalese.