1. of, relating to, or occurring in autumn
2. characteristic of autumn; suggesting maturity or decline
Usage: often literary

Examples

• The autumnal leaves created a colorful carpet on the ground.
• She enjoyed the crisp autumnal air during her morning walk.
• The autumnal equinox marks the beginning of fall.
• His autumnal years were filled with reflection and wisdom.
• The garden had an autumnal beauty with its golden hues.
• Autumnal weather brought cooler temperatures and shorter days.