To make accessible, visible, or available; to submit to review, examination, or inquiry through the elimination of restrictions or impediments.
To open a judgment means to render it capable of reexamination by removing or relaxing the bar of its finality. A judgment is ordinarily opened at the insistence of a party who is able to show good cause as to why the execution of the judgment would be inequitable.
To open a court is to formally announce, ordinarily through the bailiff, that the session has commenced and that the business before the tribunal will proceed.
The term open is also used as an adjective in reference to that which is patent, visible, apparent, or notorious, such as a defect in a product, or conduct such as lewdness.