Main·tain v. t. [imp. & p. p. Maintained p. pr. & vb. n. Maintaining.]
1. To hold or keep in any particular state or condition; to support; to sustain; to uphold; to keep up; not to suffer to fail or decline; as, to maintain a certain degree of heat in a furnace; to maintain a fence or a railroad; to maintain the digestive process or powers of the stomach; to maintain the fertility of soil; to maintain present reputation.
2. To keep possession of; to hold and defend; not to surrender or relinquish.
God values . . . every one as he maintains his post. --Grew.
3. To continue; not to suffer to cease or fail.
Maintain talk with the duke. --Shak.
4. To bear the expense of; to support; to keep up; to supply with what is needed.
Glad, by his labor, to maintain his life. --Stirling.
What maintains one vice would bring up two children. --Franklin.
5. To affirm; to support or defend by argument.
It is hard to maintain the truth, but much harder to be maintained by it. --South.
Syn: -- To assert; vindicate; allege. See Assert.