eat in(redirected from ate in)
To eat at one's home, as opposed to eating at a restaurant ("eating out"). Neither of us felt like going out, so we ate in tonight.
eat in (to something)
to erode into something; to etch something. The acidic water ate into the rocks on the shore. The acid ate in and weakened the structure.
to eat a meal at home. I really don't want to eat in tonight. Let's eat in. I'm tired.
Have a meal at home, as in Are we eating in tonight? [Colloquial; second half of 1900s] Also see eat out, def. 1.
To eat at home, rather than in a restaurant: It's raining outside, so let's eat in tonight.