(often with "the") San Francisco, after the 415 area code.

(firearms) A standard kind of firearm designed to fire bullets that are approximately 0.45 inch in diameter.

plural of .45

A game played with a set of common double-six dominoes.

plural of 404 page

(Internet) The result of trying to follow a broken link within a website.

(US, geography) The contiguous continental states area of the United States of America, comprising 48 states in number, and the District of Columbia, excluding Alaska and Hawaii.

(US, geography) the contiguous continental states area of the United States of America, comprising 48 states in number, and the District of Columbia, excluding Alaska and Hawaii.

plural of 419er

(US) A tax-qualified, defined-contribution pension account.