0 to have to pay money back to someone who gave you money in the past -- deber
1 to have to give something to someone because they deserve it -- deber una disculpa, una explicación, etc. a alguien
2 to be required to pay back money you have borrowed -- deber
3 to feel grateful to sb, because they have helped you -- deber
4 to have a duty to do sth for sb -- deber
We owe it to our environment, our health and our descendants to stand firm.
We owe them a great deal of gratitude.
I think that we owe it to them.
There was a ruthless purge of small and weak parties owing allegiance exclusively to their leaders.
We owe it to ourselves to perform this act.
I would stress the need for effective monitoring both of recipients, and of altruistic and voluntary donors, to whom the public cannot fail to owe a debt of gratitude.