Verb
(idiomatic) To do or be involved in doing; to do (often something mischievous or inappropriate).
I saw you hiding in the bushes yesterday. What were you up to?
(idiomatic) To depend on, to be the choice of.
Source: en.wiktionary.orgA fragment of a human jaw, was found in Sićevo (Mala Balanica) and believed to be up to 525,000—397,000 years old. Source: Internet
Aquaculture leases in Maine can be up to 100 acres apiece, with a single owner having up to 1,000 acres in total. Source: Internet
And this entails training and retraining of our security personnel to be up to date with the trends in the sector globally. Source: Internet
And eventually be up to 500 kilowatts. Source: Internet
And it will be up to the men and women who will set sail from Harwich on 5 November to ensure that these minimum scientific operations are maintained in and crucial data collection is carried out. Source: Internet
"And then come to us, and if push comes to shove, I think it will be up to the ministry to figure out if we are going to do something." Source: Internet