know-allˈknow-all noun [countable] British English informal 
someone who behaves as if they know everything – used to show disapproval SYN know-it-all American English
someone who behaves as if they know everything – used to show disapproval SYN know-it-all American English- UK Border Agency
- UK Intellectual Property Office
- UKIP
- Ukraine
- Ukrainian
- ukulele
- UL
- Ulaanbaatar
- -ular
- ulcer
- ulcerate
- ulcerated
- ulceration
- ulcerous
- Ullswater
- ulna
- Ulster
- Ulster Defence Association
- Ulster Defence Regiment
- Ulster Democratic Unionist Party
- Ulster Unionists
- Ulster Volunteer Force
- ulterior
- ultimate
- ultimate fighting