1At, to, or from a lower level or position.
- 1.1Lower in rank.‘subaltern’
low-ranking, lower-ranking, subordinate, sub-, lesser, lower, minor, secondary, inferior
- 1.2Of a smaller size; of a subordinate nature.
2Somewhat; nearly; more or less.
3Denoting subsequent or secondary action of the same kind.‘sublet’
In names of compounds containing a relatively small proportion of a component.
Sub- is also found assimilated in the following forms: suc- before c; suf- before f; sug- before g; sup- before p; sur- before r; sus- before c, p, t
From Latin sub ‘under, close to’.