Christmas Island

WordReference Random House Unabridged Dictionary of American English © 2025

Christ′mas Is′land, 

1. Place Names an Australian island in the Indian Ocean, ab. 190 mi. (300 km) S of Java. 3300;
   52 sq. mi. (135 sq. km).
2. Place Names one of the Line Islands, in Kiribati (Gilbert Islands), in the central Pacific;
   sovereignty disputed by U.S.: largest atoll in the Pacific;
   former U.S. test center for nuclear warheads. ab. 220 sq. mi. (575 sq. km).

Collins Concise English Dictionary © HarperCollins Publishers::

Christmas Island noun

1. the former name (until 1981) of Kiritimati
2. an island in the Indian Ocean, south of Java: administered by Singapore (1900–58), now by Australia; phosphate mining. Pop: 1496 (2013 est). Area: 135 sq km (52 sq miles)