take temporary possession of as a security, by legal authority
"The FBI seized the drugs"
"The customs agents impounded the illegal shipment"
"The police confiscated the stolen artwork"
To fasten, to join to (literally and figuratively).
"She attached a ribbon to the gift box while also attaching her hopes of happiness to his return."
In plain English: To attach something means to fasten it securely so that it stays connected to another object.
"Please attach your completed form to this email and send it back by Friday."
Usage: Use attach when you physically secure an object or metaphorically link information to something else, such as attaching a file to an email. Avoid confusing it with "connect," which implies establishing communication between two separate systems rather than fastening one item to another.
The word attach comes from the Middle French verb meaning "to bind" or "tie with a stick." It entered English as an alternative to the older Germanic root that gave us words like tie and fasten.