Changer/ˈtʃeɪndʒər/ Definition 1 of 3Pro Tip 1/3Physical Objects Changer often refers to devices used to replace or switch items, like coins. I need a dollar in quarters; let's use the coin changer. Pro Tip 2/3Abstract Concepts Can also mean someone who changes ideas, not just physical things. His approach as a policy changer was revolutionary. Pro Tip 3/3Neutral Term Changer on its own is neutral, not implying good or bad alterations. As a climate changer, humans have a big impact on the planet.