stately

Impressive and dignified, as in size or appearance; majestic: synonym: grand.

Dignified and slow; measured.

In a stately manner.

Grand, lofty, or majestic in proportions, bearing, manner, or the like; dignified; elevated: applied to persons or to things.

Synonyms August, etc. (see majestic), imperial, princely, royal, palatial, pompous, ceremonious, formal.