unknown

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A search and rescue mission successfully recovered the pilot of the jet, but what happened to the jet's second crew member, a weapons systems officer, remains unknown, CBS News has reported.

From BBC • Apr. 4, 2026

The fate of the weapons operator -- who sits behind the pilot during flight -- remains unknown.

From Barron's • Apr. 3, 2026

Researchers at Oregon Health & Science University have identified a previously unknown system inside cells that acts like internal "trade winds," rapidly carrying important proteins to the front edge of the cell.

From Science Daily • Apr. 1, 2026

A search of the area did not yield more human remains and it was unknown to whom it belonged.

From Los Angeles Times • Mar. 30, 2026

He picked up his pencil and began to try to untangle an equation with unknown x’s and unnamed y’s.

From "Tiger Boy" by Mitali Perkins