Webster’s Revised Unabridged Dictionary · 1913
Tributary
Trib′u·ta·ry (trĭb′ū·tā·ry̆), a. [OE. tributaire, F. tributaire, L. tributarius. See Tribute.] 1. Paying tribute to another, either from compulsion, as an acknowledgment of submission, or to secure protection, or for the purpose of purchasing peace.
[Julius] unto Rome made them tributary. Chaucer.
2. Hence, subject; subordinate; inferior.
He to grace his tributary gods. Milton.
3. Paid in tribute. "Tributary tears." Shak.
4. Yielding supplies of any kind; serving to form or make up, a greater object of the same kind, as a part, branch, etc.; contributing; as, the Ohio has many tributary streams, and is itself tributary to the Mississippi.
Trib′u·ta·ry, n.; pl. Tributaries. 1. A ruler or state that pays tribute, or a stated sum, to a conquering power, for the purpose of securing peace and protection, or as an acknowledgment of submission, or for the purchase of security.
2. A stream or river flowing into a larger river or into a lake; an affluent.