c.1400, "arrest of a person on judicial warrant" (mid-13c. in Anglo-Latin), from French attachement, from attacher (see attach). Application to property (including, later, wages) dates from 1590s; meaning "sympathy, devotion" is recorded from 1704; that of "something that is attached to something else" dates from 1797 and has become perhaps the most common use since the rise of e-mail.