lunch

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A meal eaten at midday.
• noun The food provided for a midday meal.
• intransitive verb To eat a midday meal.
• idiom (out to lunch) Not in touch with the real world; crazy.

from The Century Dictionary.

• To take a lunch or luncheon.
• noun A large lump or piece, as of bread.
• noun A slight repast or meal between breakfast and dinner, or, as formerly, between dinner and supper, or between dinner or supper and bedtime; luncheon.

from the GNU version of the Collaborative International Dictionary of English.

• noun A luncheon; specifically, a light repast between breakfast and dinner, most commonly about noontime.
• intransitive verb To take luncheon.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A light meal usually eaten around midday, notably when not as main meal of the day.
• noun cricket A break in play between the first and second sessions.
• noun Minnesota, US Any small meal, especially one eaten at a social gathering.
• verb To eat lunch.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb take the midday meal
• noun a midday meal
• verb provide a midday meal for