distributary /di-ˈstri-byə-ˌter-ē/adjective 1noun 1forms 3 adjective1 •That distributes.A posthumous child is as much entitled to a distributary share, under the statute of distributions, as one that is born at the time of the death of its father […] — 1816 noun1 •A stream of water (either natural or artificial) that branches off and flows away from a main stream channel.The bed of the distributary is at a slight elevation above that of the main canal, and in the latter is placed an ordinary check regulator controlled by flashboards […] — 1894 formsdistributaries · more distributary · most distributary