1 not in a reasonable or intelligent manner; "she reacted unreasonably when she learned she had failed" [ant: sanely]
2 to a degree that exceeds the bounds or reason or moderation; "his prices are unreasonably high" [syn: immoderately] [ant: reasonably, reasonably]
- In an unreasonable manner.
- He behaved unreasonably.
- Of or relating to something that is unreasonable.
- The team was given an unreasonably short amount of time to put together a presentation.