from
The Collaborative International Dictionary of English v.0.48
Back \Back\, a.
1. Being at the back or in the rear; distant; remote; as, the
back door; back settlements.
[1913 Webster]
2. Being in arrear; overdue; as, back rent.
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3. Moving or operating backward; as, back action.
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{Back blocks}, Australian pastoral country which is remote
from the seacoast or from a river. [Webster 1913 Suppl.]
{Back charges}, charges brought forward after an account has
been made up.
{Back filling} (Arch.), the mass of materials used in filling
up the space between two walls, or between the inner and
outer faces of a wall, or upon the haunches of an arch or
vault.
{Back pressure}. (Steam Engine) See under {Pressure}.
{Back rest}, a guide attached to the slide rest of a lathe,
and placed in contact with the work, to steady it in
turning.
{Back slang}, a kind of slang in which every word is written
or pronounced backwards; as, nam for man.
{Back stairs}, stairs in the back part of a house; private
stairs. Also used adjectively. See {Back stairs},
{Backstairs}, and {Backstair}, in the Vocabulary.
{Back step} (Mil.), the retrograde movement of a man or body
of men, without changing front.
{Back stream}, a current running against the main current of
a stream; an eddy.
{To take the back track}, to retrace one's steps; to retreat.
[Colloq.]
[1913 Webster]