1. people who are eating a meal, especially at a restaurant
2. small, informal restaurants that typically serve simple food and are open long hours

Examples

• The waiter served coffee to all the diners at table six.
• Late-night diners filled the restaurant after the concert ended.
• The chef prepared fresh meals for the evening diners.
• Small-town diners often serve the best comfort food.
• Highway diners are popular stops for travelers.
• The old-fashioned diner had red vinyl booths and a chrome counter.
• Many diners stay open 24 hours to serve shift workers.
• The diners at the next table were discussing their vacation plans.