out to

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Related to out to: ought to

out to (some meal)

Away from one's normal location to eat a particular meal. Do you want to go out to brunch tomorrow? Sorry, the boss is out to lunch right now. Can I leave a message?
See also: out

out to (a meal)

to be away, eating a meal. Mary is out to lunch right now. Fred went out to dinner for the evening.
See also: out