ostentation

noun3

1. •
   Ambitious display; vain show; display intended to excite admiration or applause.
2. •
   A group of peafowl.

   • At times there are more than 100 deer on his property and an ostentation of peacocks. — 2001
3. •
   (no longer used) A show or spectacle.

   • Let her awhile be secretly kept in, And publish it that she is dead indeed: Maintain a mourning ostentation — 1598