Definitions: (adjective) If something is nuclear, it is small and important. (adjective) Nuclear weapons, power, waste, etc. is produced by the collision of more than one nucleus, the central part of an atom.
Examples: (adjective) Most Canadians live in a nuclear family: the husband, wife, and children. (adjective) The US has more nuclear weapons than any other country. Many of them are called atomic bombs. (adjective) In 2010, Japan relied mainly on nuclear power (atomic energy) generation for its energy needs.
Synonyms: central, basic, fundamental.
Academic Word List Sublist and Group: 8 E