declare

To make clear, explain, interpret.

Then answered Peter and sayd to him: declare unto us thys parable.

To declare this a little, vve muſt aſſume, that the Surfaces of all ſuch Bodies, […] are exactly ſmooth only in a popular, or at moſt in a Phyſical ſenſe, but not in a ſtrict and rigid ſenſe.

To assert or announce formally, officially, explicitly, or emphatically.

He declared him innocent.

declare bankruptcy

To inform government customs or taxation officials of goods one is importing or of income, expenses, or other circumstances affecting one's taxes.

The prosecution has introduced evidence, including canceled checks, to show that the judge failed to declare part of his income.

To show one's cards in order to score.

For a constituency in an election to officially announce the result

Houghton and Sunderland South was the first constituency to declare in the 2015 general election.