1.on the move;
up and about
2.(of quantities) imprecise but fairly close to correct;
lasted approximately an hour
3.all around or on all sides;
dirty clothes lying around (or about)
4.in the area or vicinity;
a few spectators standing about
5.to or among many different places or in no particular direction;
wandering about with no place to go
6.in or to a reversed position or direction;
about face
7.in rotation or succession;
turn about is fair play
8.(of actions or states) slightly short of or not quite accomplished; `near' is sometimes used informally for `nearly' and `most' is sometimes used informally for `almost';
the job is (just) about done