| Noun | 1. | Omaha - a member of the Siouan people formerly living in the Missouri river valley in northeastern NebraskaDhegiha - any member of a Siouan people speaking one of the Dhegiha languages | |
| 2. | Omaha - largest city in Nebraska; located in eastern Nebraska on the Missouri river; a major transportation center of the Midwestcity, metropolis, urban center - a large and densely populated urban area; may include several independent administrative districts; "Ancient Troy was a great city" | |
| 3. | Omaha - the Dhegiha dialect spoken by the Omaha peopleDhegiha - a branch of the Siouan languages | |
| 4. | Omaha - thoroughbred that won the triple crown in 1935thoroughbred - a racehorse belonging to a breed that originated from a cross between Arabian stallions and English mares | |