PRI: Personal Record Identifier (Canada) PRI: Periodic Reinvestigation: PRI: Preliminary Rifle Instruction: PRI: Planning, Review, and Inspection: PRI: Progressive Routing Indicator (US DoD) PRI: Prisoner Reentry Initiative (various locations) PRI: Policy Research Institute (various locations)
Adding definition, to unite or join so as to increase the number, quantity, size, or importance: to add two cups of sugar; to add a postscript to her letter; to add insult to injury. See more. Dictionary.com
The terms add-on and add-in are often, but not always, used synonymously. The term add-in can refer to individual chips you can insert into boards that are already installed in your computer. Add-on, on the other hand, almost always refers to an entire circuit board, cartridge, or program.