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The Collaborative International Dictionary of English v.0.48 (gcide)

Submarine \Sub`ma*rine"\, n.
1. A submarine boat; a ship that can travel under the surface
of the water. Most such ships are ships of war, as part of
a navy, but submarines are also used for oceanic research.
Also called {sub} and (from the German U-Boot) {U-boat}.
esp., Nav., a submarine torpedo boat; -- called specif.
{submergible submarine} when capable of operating at
various depths and of traveling considerable distances
under water, and {submersible submarine} when capable of
being only partly submerged, i.e., so that the conning
tower, etc., is still above water. The latter type and
most of the former type are submerged as desired by
regulating the amount of water admitted to the ballast
tanks and sink on an even keel; some of the former type
effect submersion while under way by means of horizontal
rudders, in some cases also with admission of water to the
ballast tanks.
[Webster 1913 Suppl. PJC]

2. A stowaway on a seagoing vessel. [Colloq.]
[PJC]

3. A {submarine sandwich}.
[PJC]


submarine sandwich \sub`ma*rine" sand"wich\, n.
A large sandwich on an elongated roll, usually incompletely
cut into two halves, filed with various cold cuts, meatballs,
lettuce, cheese, tomatoes, olives, etc., and spiced
variously, and often having oil or other dressing applied;
called also {hoagie}, {hero}, {hero sandwich}, {grinder},
{sub}, {submarine}, {poor boy}, and {Italian sandwich}. A
single such sandwich may consitute a substantial meal. Very
large variants are sometimes prepared for social gatherings
and cut into pieces for individual consumption.
[PJC]


Sub \Sub\, n.
1. A subordinate; a subaltern. [Colloq.]
[1913 Webster]

2. a shortened form of {submarine}, the boat.
[PJC]

3. a shortened form of {submarine sandwich}; also called
{hero}, {hero sandwich}, and {grinder}.
[PJC]


Sub- \Sub-\ [L. sub under, below; akin to Gr. ?, Skr. upa to,
on, under, over. Cf. {Hypo-}, {Super-}.]
1. A prefix signifying under, below, beneath, and hence
often, in an inferior position or degree, in an imperfect
or partial state, as in subscribe, substruct, subserve,
subject, subordinate, subacid, subastringent, subgranular,
suborn. Sub- in Latin compounds often becomes sum- before
m, sur before r, and regularly becomes suc-, suf-, sug-,
and sup- before c, f, g, and p respectively. Before c, p,
and t it sometimes takes form sus- (by the dropping of b
from a collateral form, subs-).
[1913 Webster]

2. (Chem.) A prefix denoting that the ingredient (of a
compound) signified by the term to which it is prefixed,is
present in only a small proportion, or less than the
normal amount; as, subsulphide, suboxide, etc. Prefixed to
the name of a salt it is equivalent to basic; as,
subacetate or basic acetate. [Obsoles.]
[1913 Webster]