Definition of below-the-radar

: not prominent, widely noticed, or well-known … the contemporary below-the-radar hip-hop scene in South-central Los Angeles.Publishers Weekly, 3 Apr. 2000 Gershon plays the leader of a below-the-radar girl group …— Diane Vadino, Spin, November 2003 The Internet has created an almost limitless battlefield for below-the-radar attacks.— Michael Isikoff et al., Newsweek, 21 Jan. 2008

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First Known Use of below-the-radar

1992, in the meaning defined above

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The first known use of below-the-radar was in 1992

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