I. ˈjunk food BrE AmE ( also junk ) noun [uncountable]
informal food that is not healthy, for example because it contains a lot of fat, sugar etc ⇨ fast food
II. junk 1 /dʒʌŋk/ BrE AmE noun
[ Sense 1-2: Date: 1300-1400 ; Origin: Perhaps from Old French jonc 'reed' ]
[ Sense 3: Date: 1500-1600 ; Language: Portuguese ; Origin: junco , from Javanese jon ]
1 . [uncountable] old or unwanted objects that have no use or value:
This cupboard’s full of junk.
► Do not use junk when you are talking about things such as empty packets, cans, and bottles that are left in a public place. Use litter : Don’t drop litter in the street.
2 . [uncountable] ↑ junk food
3 . [countable] a Chinese sailing boat
III. junk 2 BrE AmE verb [transitive]
to get rid of something because it is old or useless