1TDTD a secret group of letters or numbers that you must type into a computer before you can use a system or program :
Enter your password, then click on the 'proceed' icon.
Give your user name and password.
Enter your password, then click on the 'proceed' icon.
Give your user name and password.2PM a secret word or phrase that someone has to say before they are allowed to enter a place such as a military camp

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