1. external devices that connect to and work with a computer, such as keyboards, mice, printers, and monitors
Usage: computing; plural form
2. things that are secondary or less important than the main subject or activity
Usage: general usage; plural form

Examples

• The computer lab needs new peripherals like keyboards and mice.
• Make sure all peripherals are connected before starting the presentation.
• The printer and scanner are essential peripherals for the office.
• We can discuss the peripherals later; let’s focus on the main issue first.
• The store sells computers and all necessary peripherals.
• Don’t get distracted by peripherals when studying for the exam.