zero-hoursˈzero-hours adjective British English 
a zero-hours contract is one in which a worker may or may not be given any work in a week but must be available for work, and is only paid for the hours they work
a zero-hours contract is one in which a worker may or may not be given any work in a week but must be available for work, and is only paid for the hours they work- unique
- uniquely
- uniqueness
- unisex
- unison
- unit
- Unitarian
- unitary
- Unite
- unite
- United
- united
- United Arab Emirates
- United Artists
- United Farm Workers
- United Kingdom
- United Nations
- United Nations High Commission for Refugees
- United Negro College Fund
- United Reformed Church
- United States Citizenship and Immigration Services
- United States of America
- United Way
- unit price
- unit trust