Relating to or characteristic of the philosophical ideas of Bishop George Berkeley, especially his theory that reality depends on being perceived.
From the name 'Berkeley' (the philosopher George Berkeley, 1685-1753) plus the adjective suffix -ian.
Berkeley's wild idea—that nothing exists unless someone perceives it—supposedly made Dr. Johnson kick a stone and declare 'I refute it thus!' It's one of philosophy's most mind-bending thought experiments that still trips people up today.
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