o'clock

according to the clock; "it's three o'clock in Tokyo now" ;

o'er

throughout a period of time; "stay over the weekend" ;

o.k.

in a satisfactory or adequate manner; "she'll do okay on her own"; "held up all right under pressure"; (`alright' is a nonstandard variant of `all right') ;

obdurately

in a stubborn unregenerate manner; "she remained stubbornly in the same position" ;

obediently

in an obedient manner; "obediently she slipped off her right shoe and stocking" ;

objectionably

in an obnoxious manner; "he said so in one of his more offensively intellectually arrogant sentences" ;

objectively

with objectivity; "we must look at the facts objectively" ;

obligatorily

in a manner that cannot be evaded; "the ministry considers that contributions to such a fund should be met from voluntary donations rather than from rates compulsorily levied." ; in an obligatory manner; "this rule applies obligatorily" ;

obligingly

in accommodation; "obligingly, he lowered his voice" ;

obliquely

at an oblique angle; "the sun shone aslant into his face" ; to, toward or at one side; "darting eyes looking sidelong out of a wizened face" ;

obnoxiously

in an obnoxious manner; "he said so in one of his more offensively intellectually arrogant sentences" ;

obscenely

in a lewd and obscene manner; "he had seen how in their dances the white men and women held one another obscenely" ; to an obscene degree; "this man is obscenely rich" ;

obscurely

in an obscure manner; "this work is obscurely written" ;

obsequiously

in an obsequious manner; "she acts obsequiously toward her boss" ;

observably

in a noticeable manner; "he changed noticeably over the years" ;

observantly

in an observant manner ;

observingly

in an observant manner ;

obsessionally

in a compulsive manner; "he cleaned his shoes compulsively after every walk" ;

obsessively

in a compulsive manner; "he cleaned his shoes compulsively after every walk" ;

obstinately

in a stubborn unregenerate manner; "she remained stubbornly in the same position" ;

obstreperously

in manner that attracts attention; "obstreperously, he demanded to get service" ;

obstructively

in an obstructive manner; "he acted very obstructively when we tried to carry out our project" ;

obtrusively

in an obtrusive manner ;

obtusely

in a stupid manner; "he had so rapaciously desired and so obtusely expected to find her alone" ;

obviously

unmistakably (`plain' is often used informally for `plainly'); "the answer is obviously wrong"; "she was in bed and evidently in great pain"; "he was manifestly too important to leave off the guest list"; "it is all patently nonsense"; "she has apparently been living here for some time"; "I thought he owned the property, but apparently not"; "You are plainly wrong"; "he is plain stubborn" ;

occasionally

now and then or here and there; "he was arrogant and occasionally callous"; "open areas are only occasionally interrupted by clumps of trees"; "they visit New York on occasion"; "now and again she would take her favorite book from the shelf and read to us"; "as we drove along, the beautiful scenery now and then attracted his attention" ;

oddly

in a manner differing from the usual or expected; "had a curiously husky voice"; "he's behaving rather peculiarly" ; in a strange manner; "a queerly inscribed sheet of paper" ;

odiously

in an offensive and hateful manner; "I don't know anyone who could have behaved so abominably" ;

of a sudden

happening unexpectedly; "suddenly she felt a sharp pain in her side" ;

of all time

at any time; "did you ever smoke?"; "the best con man of all time" ;

of course

as might be expected; "naturally, the lawyer sent us a huge bill" ;

of each person

per person; "we are spending $5,000 per capita annually for education in this district" ;

of late

in the recent past; "he was in Paris recently"; "lately the rules have been enforced"; "as late as yesterday she was fine"; "feeling better of late"; "the spelling was first affected, but latterly the meaning also" ;

of necessity

in such a manner as could not be otherwise; "it is necessarily so"; "we must needs by objective" ;

off

no longer on or in contact or attached; "clean off the dirt"; "he shaved off his mustache" ; from a particular thing or place or position (`forth' is obsolete); "ran away from the lion"; "wanted to get away from there"; "sent the children away to boarding school"; "the teacher waved the children away from the dead animal"; "went off to school"; "they drove off"; "go forth and preach" ; at a distance in space or time; "the boat was 5 miles off (or away)"; "the party is still 2 weeks off (or away)"; "away back in the 18th century" ;

off-hand

without preparation; "I don't know the figures off-hand" ;

off-the-clock

overtime without extra compensation; "she often has to work off-the-clock" ;

off and on

not regularly; "they phone each other off and on" ;

off the cuff

without preparation; "the presidential candidate made a remark off the cuff" ;

off the record

not for quotation; "he spoke to the reporter off the record" ;