Origin: 1300–50; Middle English atachen < Anglo-French atacher to seize, Old French atachier to fasten, alteration of estachier to fasten with or to a stake, equivalent to estach(e) (< Germanic *stakkastake) + -ier infinitive suffix
(reflexive or passive) to become associated with or join, as in a business or other venture: he attached himself to the expedition
3.
to be inherent (in) or connected (with): responsibility attaches to the job
4.
to attribute or ascribe: to attach importance to an event
5.
to include or append, esp as a condition: a proviso is attached to the contract
6.
(usually passive) military to place on temporary duty with another unit
7.
(usually passive) to put (a member of an organization) to work in a different unit or agency, either with an expectation of reverting to, or while retaining some part of, the original working arrangement
8.
to appoint officially
9.
law to arrest or take (a person, property, etc) with lawful authority
10.
obsolete to seize
[C14: from Old French atachier to fasten, changed from estachier to fasten with a stake, from estachestake1]
early 14c., "to take or seize (property or goods) by law," a legal term, from O.Fr. estachier "to attach" (Fr. attacher, It. attaccare), perhaps from a- "to" + Frank. *stakon "a post, stake" or a similar Gmc. word (see stake (n.)). Meaning "to fasten, affix, connect" is first