a large, often elaborate meal, typically held to celebrate a special occasion.

祝賀や特別な行事で行う大勢向けの豪華な食事

an abundant or plentiful supply of something enjoyable (often used figuratively: 'a feast for the eyes').

（比喩的に）満喫できる豊富な供給物（例：目のごちそう）

to eat sumptuously or indulge in a large meal.

豪華に大量に食べる（たらふく食べる）

to enjoy something intensely (often used figuratively: 'feast on' or 'feast one's eyes on').

（比喩的に）じっくり楽しむ・堪能する（例：目を楽しませる）