/ juː; NAmE / noun , abbreviation
(also u ) [ C , U ] ( pl. Us , U's , u's / juːz; NAmE /) the 21st letter of the English alphabet :
'Under' begins with (a) U / 'U'.
—see also U-boat , U-turn
( BrE ) universal (the label of a film / movie that is suitable for anyone including children) :
Aladdin, certificate U
For more information see the Cultural Guide