What is the meaning of Sub?

Abbreviation of submarine.

Short for submarine sandwich.: a sandwich made on a long bun.

Clipping of submersible.

Clipping of substitute, often in sports or teaching.

Clipping of subscription (a payment made for membership of a club, etc.)

Clipping of subtitle.

Clipping of subroutine. (sometimes one that does not return a value, as distinguished from a function, which does)

Clipping of subeditor.

Clipping of subcontractor.

Clipping of subwoofer.

Clipping of submission (of a work for publication)

Clipping of submissive.

Clipping of subordinate.

Clipping of subaltern.

Clipping of subscription (or a subscriber) to an online channel or feed.

Short for subsistence money (part of a worker's wages paid before the work is finished)

Short for subreddit.

Clipping of subject (particular area of study).

To substitute for.

To work as a substitute teacher, especially in primary and secondary education.

To replace (a player) with a substitute.

To bring on (a player) as a substitute.

To perform the work of a subeditor or copy editor; to subedit.

To subtitle (usually a film or television program).

To lend (a person) money.

To subscribe.

To take a submissive role.

Under.

To coat with a layer of adhering material; to planarize by means of such a coating.

To prepare (a slide) with a layer of transparent substance to support and/or fix the sample.

submarine, sub

under, below

under, below

skin-diver, scuba diver

bottom, submissive (BDSM partner)

  1. under, beneath
  2. behind
  3. at the feet of
  4. within, during
  5. about, around (time); just before, just after, shortly before, shortly after

under, beneath

behind

at the feet of

within, during

about, around (time); just before, just after, shortly before, shortly after

  1. under, up to, up under, close to (of a motion)
  2. until, before, up to, about

under, up to, up under, close to (of a motion)

until, before, up to, about

to visit (to go and meet someone)

to examine (to observe or inspect carefully)

Alternative form of subcelebridade

under, below, beneath, underneath

under

a subwoofer, a bass loudspeaker

Source: wiktionary.org