I. noun
COLLOCATIONS FROM OTHER ENTRIES
at three o'clock/seven thirty etc on the dot (= at exactly 3:00/7:30 etc )
▪
Mr Green arrived at six on the dot .
five o'clock shadow
it’s turned 2 o'clock/5/midday etc
▪
It’s just turned three.
O grade
O level
will o' the wisp
PHRASES FROM OTHER ENTRIES
at ten thirty/2 o'clock etc sharp
be going on (for) 5 o'clock/60/25 etc
getting on for 90/10 o'clock/2,000 etc
one o'clock/two o'clock etc
the (9 o'clock) watershed
II. interjection
EXAMPLES FROM OTHER ENTRIES
▪
O Lord, hear our prayer.