letter box meaning in Hindi

Get a special cover for the letter box. If there is any open space between windows and doors, close it; similarly, if there is open space between the frame of windows and the outer opening, close that too.
हॉल को ज़्यादा गर्म रखने के लिए फ़्रन्ट डोर पर भारी पर्दा लटका दें।

noun.

a private box for delivery of mail
synonyms：
public box for deposit of mail
synonyms：,
a numbered compartment in a post office where mail is put to be called for
synonyms：, , ,