simple past tense and past participle of back
"She backed her car into the driveway after a long day at work."
In plain English: Backed means supported by someone else's help, money, or approval.
"The company was backed by several major investors before launching its new product."
having a back or backing, usually of a specified type
"The old car was backed into the garage by its owner."
used of film that is coated on the side opposite the emulsion with a substance to absorb light
"The photographer selected a high-quality black-and-white roll that was backed to prevent fogging when developing under bright safelight conditions."
Put on one's back; killed; rendered dead.
"The lion backed its prey against a rock before delivering the fatal blow that rendered it dead."
In plain English: Backed means supported by someone else who will help you if things go wrong.
"The backed-up traffic made us late for work."
Usage: Use this adjective only in archaic or literary contexts to describe someone who has been shot from behind, as it is rarely used in modern everyday speech. In contemporary English, prefer the past tense verb "backed" when referring to supporting a person or idea rather than killing them.
The word backed comes directly from the verb back, meaning to support or stand behind someone. It entered English as a regular past tense form without any change in its core definition of providing assistance or reinforcement.