It seems ironic to be defining the term 'dictionary,' but here we go! Dictionaries are resources for finding word meanings, parts of speech, word origins and even synonyms and antonyms. Dictionaries have definitely evolved over the years. The English language really began with the Anglo-Saxons in Great Britain.
If it is a US Passport, that it is the 9 digit number located in the top corner of the passport info page. In the example below the passport number is 31195855. Other Countries have different types of numbers (usually with letters added) but most often it's in the same place. This Canadian Passport number is AB504966.
Click here to check your passport application status at Passport seva site. Select the Application Type as. Type your file number issued at the time of passport applicant. This 15 digit file number is printed at the top right of the acknowledgement letter. Select your date of birth as you have mentioned in the application.