Said for a quantity (time, size, place, ...) that is given in a imprecise way but close to the real value.
(of actions or states) slightly short of or not quite accomplished; "the job is (just) about done"; "the baby was almost asleep when the alarm sounded"; "we're almost finished"; "the car all but ran her down"; "he nearly fainted"; "talked for nigh onto 2 hours"; "the recording is well-nigh perfect"; "virtually all the parties signed the contract"; (`near' is used informally for `nearly' as in "I was near exhausted by the run"; `most' is used informally for `almost' as in "most everybody agrees")
(of quantities) imprecise but fairly close to correct; "lasted approximately an hour"; "in just about a minute"; "he's about 30 years old"; "I've had about all I can stand"; "we meet about once a month"; "some forty people came"; "weighs around a hundred pounds"; "roughly $3,000"; "holds 3 gallons, more or less"; "20 or so people were at the party"
(of quantities) imprecise but fairly close to correct; "lasted approximately an hour"; "in just about a minute"; "he''s about 30 years old"; "I''ve had about all I can stand"; "we meet about once a month"; "some forty people came"; "weighs around a hundre
(of quantities) imprecise but fairly close to correct