sub
[adjective]
Synonyms: subordinate, collateral, dependent, secondary, subject, tributary, under
[noun]
Synonyms: substitute, alternate, backup, fill-in, locum tenens, pinch hitter, replacement, stand-in, succedaneum, surrogate

[TahlilGaran] English Synonym Dictionary ▲

I. sub¹ /sʌb/ noun [countable] informal

1. a submarine

2. a substitute in sports such as football

3. a subscription

4. British English part of your wages that you receive earlier than usual because you need money Synonym : advance

5. American English a long bread roll, split open and filled with meat, cheese etc

6. American English a substitute teacher

7. British English a sub-editor

[TahlilGaran] Dictionary of Contemporary English ▲

II. sub² verb (past tense and past participle subbed, present participle subbing) informal

1. [intransitive] to act as a substitute for someone
sub for
Roy’s subbing for Chris in tonight’s game.

2. [transitive] British English to give someone part of their wages earlier than usual or lend them money:
I subbed Fenella a tenner to get a decent bunch of flowers.

3. [transitive] British English to subedit something

[TahlilGaran] Dictionary of Contemporary English ▲

III. sub‧ma‧rine¹ /ˈsʌbməriːn, ˌsʌbməˈriːn/ (also sub) noun [countable]
a ship, especially a military one, that can stay under water:
a nuclear submarine

[TahlilGaran] Dictionary of Contemporary English ▲

IV. ˌsubstitute ˈteacher (also substitute, sub informal) noun [countable]
American English a teacher who teaches a class when the usual teacher is ill Synonym : supply teacher British English

[TahlilGaran] Dictionary of Contemporary English ▲

sub- /sʌb/ prefix
[Language: Latin; Origin: sub 'under, close to']

1. under or below a particular level or thing:
sub-zero temperatures
subsoil (=beneath the surface)

2. less important or powerful than someone or something, or of lower rank than someone:
a sublieutenant

3. part of a bigger whole:
a subsection
a subcommittee

4. not as good as other people or things:
substandard housing
subnormal intelligence

5. technical almost:
subtropical heat

[TahlilGaran] Dictionary of Contemporary English ▲

SUB
Submarine 
Substitute

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲