1. complete and without limitation; not holding back
2. open and frank in manner; not shy or restrained
3. not set aside or booked in advance

Examples

• She gave her unreserved support to the charity campaign.
• His unreserved praise for the team boosted everyone’s morale.
• The unreserved seating area filled up quickly before the concert.
• With unreserved enthusiasm, the children ran toward the playground.
• The restaurant keeps some unreserved tables for walk-in customers.
• Her unreserved personality made her popular at social gatherings.
• He offered unreserved cooperation with the investigation.