Interjection

1. Expressing surprise or gloating realisation; aha.
   • 1880, Lucy Bethia Walford, Troublesome Daughters

     There is Kate, taking no heed of anybody; sensible old darling — she goes at her tea and cake — Oho! she has not touched them!

   • 1914, Rupert Hughes, What Will People Say?

     "Oho, my boy, that's the woman who keeps you here! Mrs. Neff hinted at it, but I wouldn't believe it till I had it from you."

   • 1997, Bruce A Shuman, Beyond the library of the future

     Oho! Now I see where he's going with this, Frank thinks. Would have seen it earlier if I hadn't been so tired.

Interjection

1. Acknowledging a minor mistake: oops, whoops-a-daisy.
2. An indication of excitement or surprise: wow, whoa, oh, ooh, ay, chihuahua.