Adverb
later than usual or than expected
Source: WordNetthe train arrived late Source: Internet
we awoke late Source: Internet
the children came late to school Source: Internet
notice came so tardily that we almost missed the deadline Source: Internet
I belatedly wished her a happy birthday Source: Internet
A few days after they began, a government lawyer belatedly showed up with nondisclosure forms from the Department of Homeland Security. Source: Internet