Definify.com
Webster 1913 Edition
Propulsion
1.
The act driving forward or away; the act or process of propelling;
as, steam
. propulsion
2.
An impelling act or movement.
God works in all things; all obey
His first
His first
propulsion
. Whittier.
Webster 1828 Edition
Propulsion
PROPUL'SION
,Noun.
The act of driving forward.
Pro rata, [L.] in proportion.