What does «formalmente» mean in Spanish?

According to the due form.

Examples of use in Spanish: "durante la ausencia del Presidente en el país, quien está formalmente a cargo del ejecutivo es el vicepresidente".
With formality, expressly.
Formally, seriously or appropriately.

Examples of use in Spanish: "deben asistir al evento formalmente vestidos".
Before, in the past.

♦ Used in: USA - Mexico