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Meaning of Tet offensive

Tet' offen"sive

Pronunciation: [key]
  1. an offensive by Vietcong and North Vietnamese forces against South Vietnamese and U.S. positions in South Vietnam, beginning on Jan. 31, 1968, the start of Tet.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.