hi-vis /haɪˈvɪz/adjective 1noun 1forms 2 adjective1 •High-visibility.A Hi-Vis jacket which can be worn over either of the other jackets or instead of them. — 1999 noun1 •High-visibility clothing.These are not people – builders, airport staff, police officers – who need to be seen for safety. These are men wearing hi-vis for its aesthetic value. — 2018 formsmore hi-vis · most hi-vis
