'TT' definitions:
Definition of 'TT'
(from WordNet)
noun
(astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions [syn: terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time]
noun
A republic in the western central Pacific Ocean in association with the United States [syn: Palau, Republic of Palau, TT]
noun
A country scattered over Micronesia with a constitutional government in free association with the United States; achieved independence in 1986 [syn: Micronesia, Federated States of Micronesia, TT]