U

Uberrimae fidei - Of the utmost good faith
Ubi amor, ibi oculus - Where love is, there is insight
Ubi bene, ibi patria - Where you feel good, there is your home
Ubi concordia, ibi victoria - Where is the unity, there is the victory. (Publius Syrus)
Ubi dubium ibi libertas - Where there is doubt, there is freedom
Ubi fumus, ibi ignis - Where there's smoke, there's fire
Ubi revera (Ubi re vera) - When, in reality
Ubi spiritus est cantus est - Where there is spirit there is song
Ubique - Everywhere
Ultima ratio regum - The final argument of kings
Ultima ratio - Ultimate sanction
Ultima Thule - The most distant Thule
Ultimo (ult.) - Of the previous month
Ultimus Romanorum - The last of the Romans
Ultra posse nemo obligatur - No one is obligated beyond what he is able to do
Ultra vires - Beyond the powers or legal authority
Una voce - With one's voice
Unitas mirabile vinculum - The wonderful bond of unity
Unum necessarium - The one necessary
Unus multorum - One of many. (Horace)
Urbanus et instructus - A gentleman and a scholar
Urbi et orbi - To the city [Rome] and to the globe - a blessing of the pope
Ut ameris, ama! - To be loved, love!
Ut dictum (ut dict.) - As directed
Ut humiliter opinor - In my humble opinion
Ut incepit fidelis sic permanet - As loyal as she began, so she remains
Ut infra - As below
Ut sementem feceris, ita metes - As you sow, so shall you reap. (Cicero)
Ut si! - As if!

Ut supra (ut sup.) - As above
Uti foro - To play the market
Uti possidetis - As you possess
Uti, non abuti - To use, not abuse
Utile et dulce - Useful and pleasant
Uva uvam videndo varia fit - A grape changes color in seeing another grape. A bad/good friend makes you a bad/good person