Webster's Revised Unabridged Dictionary · 1913

Treat

Treat , transitive verb

[OE. treten, Old French traitier, French traiter, from Latin tractare to draw violently, to handle, manage, treat, v. intens. from trahere, tractum, to draw. See Trace, transitive verb, and compare Entreat, Retreat, Trait.]

1.
To handle; to manage; to use; to bear one's self toward; as, to treat prisoners cruelly; to treat children kindly.
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. [Obsolete]
To treat the peace, a hundred senators Shall be commissioned. — Dryden
5.
(Medicine) 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. [Obsolete] — Ld. Berners

Treat , intransitive verb

1.
To discourse; to handle a subject in writing or speaking; to make discussion; -- usually with of; as, Cicero treats of old age and of duties.
And, shortly of this story for to treat. — Chaucer
Now of love they treat. — Milton
2.
To negotiate; to come to terms of accommodation; -- often followed by with; as, envoys were appointed to treat with France.
Inform us, will the emperor treat! — Swift
3.
To give a gratuitous entertainment, esp. of food or drink, as a compliment.

Treat , noun

1.
A parley; a conference. [Obsolete]
Bid him battle without further treat. — Spenser
2.
An entertainment given as an expression of regard.
3.
That which affords entertainment; a gratification; a satisfaction; as, the concert was a rich treat.