The standard of food in Ireland is in general quite good.  Many pubs in Ireland offer food including full meals at lunch and dinner time.  These menus typically include soup, sandwiches, and a variety of main courses. 

On the main campus are The Forum cafe, and The Buttery - both canteen style food venues which serve hot meals, light lunches and snacks.   Very close to the main campus is Cornucopia, a vegan restaraunt.

Popular pubs that serve food, close to Trinity College include The Duke, and Doheny & Nesbitt's.  Near the main campus is Nassau St, Dawson St and Grafton St with many food options. Close to the side of TCD, is Brewbaker, KC Peaches, and Kilkenny Design cafe which all serve a range of hot meals and lighter lunch salads, soups and sandwiches.  

In the city centre, there is a wide range of global cuisines including Indian, Persian, Afghan, Chinese, Japanese, Italian, French, Spanish, options and an exciting food scene with something for everyone.  There are familiar fast food restaraunts that offer takeaway such as McDonald's, BurgerKing, and Dominos Pizza.  

Other well know city centre pubs, famous for the quality of their Guinness (you can also book a tour of the famous brewery), atmosphere or music are Grogan’s, The Long Hall, Kehoe’s (upstairs), the Stags Head, McDaids, and O’Donoghues on Merrion Row - you can even do a Dublin Heritage Pub trail https://www.louisfitzgerald.com/dublin-heritage-pub-trail/