a toilet in Britain
"I'm so sorry, but I have to leave because I need to use the loo."
Alternative form of lanterloo: the card game.
"The new recruit saluted his commanding officer, addressing him as Lieutenant rather than by name."
A half-mask, particularly (historical) those velvet half-masks fashionable in the 17th century as a means of protecting women's complexion from the sun.
A hot dust-bearing wind found in Bihar, Uttar Pradesh and the Punjab.
A lavatory: a room used for urination and defecation.
Lieutenant.
To urge on with cries of loo or (figuratively) by other shouting or outcry.
"After failing to beat my opponent's hand in lanterloo, I finally managed to loo them and win the pot."
To beat in the card game lanterloo.
A cry to urge on hunting dogs.
"The hunter gave a sharp l oo to urge his pack toward the scent of the fox."
A surname.
"The new neighbor, Mr. Loo, waved hello as he walked his dog down the street."