OTTAWA RIVER(noun)Did you mean?RhymesAlso try..ottawariversDefinitions There is 1 meaning of the phrase Ottawa River. Ottawa River - as a noun A river in southeastern canada that flows along the boundary between quebec and ontario to the saint lawrence river near montreal Synonyms (Exact Relations)ottawaoutaouaisWord Variations & RelationsAnagramsStarts OStarts OTStarts OTTStarts OTTAEnds REnds EREnds VEREnds IVERStarts O & ends RStarts OT & ends RStarts O & ends ERA-Z Proximitiesottava9ottavas10ottavino11ottavinos12ottawa Ottawa River otter5ottered8otterhoundottering9otters6