1. To state clearly.
2. To state firmly.
3. To make a declaration (of dutiable goods) to a customs official.
4. To declare to be; SYN. adjudge, hold.
5. To authorize payments of.

To specify the name and type of a variable that will be used in a program. In most high-level programming languages, variables are declared at the beginning of sections of code. See also variable.