Uniform Interstate Juvenile Compact. An agreement that regulates the treatment of juveniles who are not under proper supervision or control, or who have run away or escaped, and who are likely to endanger their own or others’ health, morals, or welfare. • The Compact is relied on by the state to transport juvenile runaways back to their home states. It has now been universally adopted in the United States, but not always in its entirety. — Abbr. UIJC.