adverb: to or among many different places or in no particular direction
Example: "Wandering about with no place to go"
adverb: (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'
Example: "The job is (just) about done"
adverb: in rotation or succession
Example: "Turn about is fair play"
adverb: (of quantities) imprecise but fairly close to correct