zero-zero

adjective

ze·​ro-ze·​ro ˈzir-(ˌ)ō-ˈzir-(ˌ)ō 

ˈzē-(ˌ)rō-ˈzē-(ˌ)rō

1

: characterized by or being atmospheric conditions that reduce ceiling and visibility to zero

2

: limited to zero by atmospheric conditions

Word History

First Known Use

circa 1930, in the meaning defined at sense 1