predeclare
verbEtymology From pre- + declare.
1
To declare or announce beforehand.
- their indefeasible power of predeclaring the eternal destiny of every living layman1855, Henry Hart Milman, History of Latin Christianity:
2
Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Programming, Sciences To declare some source code element (such as a class) in advance of its full description, so that other preceding parts of the code can refer to it.