Definition of food noun from the Oxford Advanced Learner's Dictionary

Oxford3000

food

noun
fuːd
 
; fuːd
 
 
1 [uncountable] things that people or animals eata shortage of food/food shortagesfood and drinkthe food industry2 [countable, uncountable] a particular type of foodDo you like Italian food?frozen foodsa can of dog food(= for a dog to eat)He's off his food(= he does not want to eat anything). see also convenience food, fast food, functional food, health food, junk food, seafood, soul food, wholefood
Idioms

food for thought

an idea that makes you think seriously and carefully
The programme certainly provides plenty of food for thought.