riparious UK /rɪˈpɛəɹi.əs/US /rɪˈpɛɹi.əs/ adjective2 •(old-fashioned) Growing or living along the banks of riversOf these, 18 (or 3 per cent.) are aquatic, 84 (or 14 per cent.) riparious or marshy, 65 ( or 11 per cent.) annuals in fields, of which 22 are found in the spring crops or "rubby." — 1867 •(no longer used) Pertaining to riverfront property.The purchaser of a riparious estate under the words "front to the levee," does not acquire the alluvion or batture, when there is land susceptible of separate ownership beyond the levee. — 1826