Meaning
A thick horizontal bar, the minus sign used for subtraction. It means take away, less or negative, and on screens it often means remove or zoom out.
People use it to drop someone from a plan, list downsides or count what is gone: “Concert tickets ➖ my whole salary” It also expresses a flat, unimpressed mood, a bit like a straight-line mouth. Pair it with ➕ for pros and cons lists.