- As due; rightfully.
- When due; at the right time.
- As required; sufficiently.
A duly appointed official.
An example of duly is a person showing up when they were supposed to arrive.
Origin of duly
- Middle English duely from due due due
From American Heritage Dictionary of the English Language, 5th Edition
- Middle English duweliche (“rightly, properly”), from dewe (“due”) + -liche (“-ly”)