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.
Passport Number Location. When you open your passport to the first page, where your picture appears and all of your personal information is typed, you will notice a number in the top right corner of the page. This is your passport number. It is between six and nine alphanumeric characters, meaning it can be made up of numbers, letters or a combination of both. If you own a passport card instead of a passport book, the passport number is in the same location; at the top right.