Late is an irregular adjective which means not on time or arriving after the expected time. Its comparative form is later. Late can also be used as an adverb to describe actions that happen after the expected time or later than usual. For example, He arrived late to the meeting or She tends to work late into the night. The comparative form later is used to compare two actions in terms of time, such as He arrived later than expected. Remember, late is the base form, later is the comparative form.