1. Under; beneath; below
2. Subordinate; secondary; next lower than or inferior to; subordinate portion of; subdivision of; with repetition (as of a process) so as to form, stress, or deal with subordinate parts or relations
3. Less than completely, perfectly, or normally; somewhat
4. Almost; nearly; falling nearly in the category of and often adjoining; bordering on
(Latin) “under”. sub judice, still under judicial consideration. sub plumbo, “under lead”; under the Pope’s seal. sub rosa, in confidence; secret. sub sigillo, “under seal”; in strict confidence. sub silentio, secret; tacit. sub specie aeternitatis, “under the aspect of eternity”; in respect of its essential nature or worth. sub voce, under that word; in the place where that subject is considered (abbreviated as s.v.).
1. (British) To read and edit as a copy editor; subedit
3. To act as a substitute