Senses
阁下/ 閣下 Your Excellency
Formal and respectful way of addressing someone, now primarily used in diplomatic contexts; Your Excellency, His Excellency, or Her Excellency
阁下/ 閣下 you
(literary) Polite way of addressing an equal in letters or speech.
阁下/ 閣下 under the pavilion
Area located beneath a pavilion or multi-story building