/sub/ , n. , v. , subbed, subbing . Informal.
n.
1. a submarine.
2. a substitute.
3. a submarine sandwich. See hero sandwich .
4. a subcontractor.
5. a sublieutenant.
6. a subordinate.
7. a subaltern.
8. Brit. an advance against one's wages, esp. one granted as a subsistence allowance.
9. Photog. a substratum.
v.i.
10. to act as a substitute for another.
v.t.
11. Photog. to coat (a film or plate) with a substratum.
[ by shortening of words prefixed with SUB- ]
Regional Variation. 3. See hero sandwich .