The eighteenth letter of the Vietnamese alphabet, called ô and written in the Latin script.

Ô Hoàn
name

Wuhuan, an ancient ethnic group in China.

Ô Khắc Lan

Ô Khắc Lan
name

(obsolete) Ukraine

The name of the Latin-script letter Ô.
The name of the Latin-script letter O.
(Northern Vietnam, Central Vietnam) umbrella (cloth-covered frame used for protection against rain or sun)
(of a table or grid) a cell
a blank (space to be filled in on a form or template)

adj

(of a horse) black

ô dù
noun

(literally, collective) all kinds of umbrellas

adj

(informal, derogatory) prone to defending or shielding your allies from scrutiny or criticism

ô dề
adj

(North Central Vietnam, colloquial) vulgar; crude; embarrassing
(by extension, colloquial) ridiculous; over-the-top

ô mai
noun

(Northern Vietnam) salted Chinese plum; smoked plum

ô nhiễm
noun

pollution

adj

polluted

ô ten
noun

(colloquial) hotel

ô tô
noun

(Northern Vietnam, Central Vietnam) car

ô tô buýt

ô tô buýt
noun

bus (motor vehicle for transporting large numbers of people along roads)
minibus (small bus, especially one used as transport for small groups)

於
character

Nôm form of ở (“to be; to live; to stay; to remain”).

Nôm form of ô (“umbrella”).