i Register
In some senses, os is marked as informal, UK, rare. Watch for register when choosing this word.
os
UK /ˌoʊ ˈɛs/ US /ˌoʊ ˈɛs/
noun 8adj 5name 3adv 1
Definitions
name
1
Initialism of Owen Sound.
2
The Ordnance Survey, official mapping agency in Great Britain (see also the noun below).
3
Initialism of Old Saxon.
adj
1
Initialism of outsize, clothes for large people.
2
Initialism of oversize.
3
Initialism of Old Style, a term used in English language historical studies to indicate that a date conforms to the Julian calendar instead of the modern Gregorian calendar.
4
Abbreviation of offscreen, indicating a line of dialogue is spoken by someone not visible onscreen.
5
Initialism of over shoulder.
adv
1
Initialism of overseas.
You did the overseas trip. You went OS.
I kind of expanded my circle a bit more when I went OS [overseas].
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