past
preposition
uk/pɑːst/ us/pæst/above a particular age or outside a stated limit:
More and more people are working until past retirement age.
We're past the point where losing a couple of employees will save us.
past
adjective [ before noun ]
uk/pɑːst/ us/pæst/during a period of time before and until the present:
Our costs have risen by 15% in the past year.
He's managed the sales department for the past 10 years.
We've been discussing the issue over the past few days.
having happened or existed before now:
I know from past experience that this campaign will work.