2. To discourse on; to handle in a particular manner, in
writing or speaking; as, to treat a subject diffusely.
3. To entertain with food or drink, especially the latter, as
a compliment, or as an expression of friendship or regard;
as, to treat the whole company.
4. To negotiate; to settle; to make terms for. [Obs.]
To treat the peace, a hundred senators Shall be
commissioned. --Dryden.
5. (Med.) To care for medicinally or surgically; to manage in
the use of remedies or appliances; as, to treat a disease,
a wound, or a patient.
6. To subject to some action; to apply something to; as, to
treat a substance with sulphuric acid. --Ure.
7. To entreat; to beseech. [Obs.] --Ld. Berners.