Definition of go by

The expression "go by" originated in the Middle English language during the 14th century. It was initially used as a command or instruction, meaning "go ahead" or "set off." However, over time, its meaning evolved to convey the idea of following or relying on something as a guide or reference point. The expression "go by" is a phrasal verb, which combines a verb with a preposition or particle to create a new meaning. In this case, the verb "go" is followed by the preposition "by," which can mean "past" or "alongside." When put together, "go by" means "to follow or refer to" something as a guide. The exact origin of the expression is uncertain, but some linguists believe that it could have come from the Middle English phrase "gyn by" (meaning "go past"), which evolved into "go buy" (meaning "to buy") and eventually "go by" in modern English. Alternatively, it could have derived from the Middle Dutch word "gaen by," meaning "to pass by." Overall, the exact origin of the expression "go by" may remain a mystery, but it's clear that its meaning has transformed over time as English evolves and adapts to new contexts and uses.