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unseen

/ʌnˈsiːn/ · un·seen
adjective
  1. Not seen; invisible or not observed. The hidden camera captured the unseen movements of the wildlife.
noun
  1. That which is not seen; the invisible or unknown. Scientists study the unseen forces that govern the universe.
Did you know? The phrase "the unseen" was famously used by Thomas Aquinas to refer to spiritual realities, and later became the title of a 1970s British TV series exploring paranormal phenomena.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Aug 19, 2026