Security Code. A numeric code (password) ... Give us your feedback on this definition. ‹ back to Glossary Index. Share on BlueSky. Share on Threads. Share on Facebook . new featured article.

Meaning acknowledgment or okay, “10-4” comes from the 10 Codes list that emergency personnel use to communicate with each other, commonly done over the radio. How 4/20 became ‘Weed Day’ ...

Yet because the initial numbers only went up to the 500s in most cases, zip codes and area numbers rarely matched up exactly. Moreover, as some areas used up their numbers, new ones got added.

Meaning acknowledgment or okay, “10-4” comes from the 10 Codes list that emergency personnel use to communicate with each other, commonly done over the radio. Ten Codes are sets of numbers ...