the.com/sign
a silent argument that everyone reads and nobody questions.
means A mark, gesture, object, or display that stands for something else — pointing the eye or mind toward meaning, direction, or warning.
from From Latin 'signum,' meaning a mark, token, or military standard — the banner a legion marched behind. It traveled through Old French 'signe' into English in the medieval period. The same root branches into 'signal,' 'signature,' and 'design,' all of them about making a mark that someone else is meant to read.
stop powerOctagon shape lets drivers recognize it from behind
oldest adsRoman shops carved stone signs into walls
red biasEyes detect red fastest, so danger wears it
blind readingBraille signs are legally required on doors
math tooThe plus-minus symbol predates printed mathematics books