sub

1 sub /ˈsʌb/ noun
plural subs
1 sub
/ˈsʌb/
noun
plural subs
Britannica Dictionary definition of SUB
[count] informal
1 
: someone who does the job of another person when that person is not able to do it : substitute
2 
British : subeditor
2 sub /ˈsʌb/ verb
subs; subbed; subbing
2 sub
/ˈsʌb/
verb
subs; subbed; subbing
Britannica Dictionary definition of SUB
1 
: to take the place of another person : to act as a substitute
[no object]
[+ object]
(chiefly Brit) — usually used as (be/get) subbed
2 
3 sub /ˈsʌb/ noun
plural subs
3 sub
/ˈsʌb/
noun
plural subs
Britannica Dictionary definition of SUB
[count] informal