From JAR-1, Definitions:
Flight time as used with respect to;
a. licensing of flight crew, is defined in JAR-FCL;
b. aircraft operations, is defined in JAR-OPS;
c. type certification of aircraft, is defined in JAR-21;
d. maintenance, is defined in JAR-OPS Subpart M.
From FAA FAR Part 1, Definitions:
Flight time means:
(1) Pilot time that commences when an aircraft moves under its own power for the purpose of flight and ends when the aircraft comes to rest after landing; or. . . .(2) For a glider without self-launch capability, pilot time that commences when the glider is towed for the purpose of flight and ends when the glider comes to rest after landing.