Answer: expansion

AnswerCrossword Clue
EXPANSIONSpread.
EXPANSIONGrowth.
expansionThe action of becoming larger or more extensive
expansionA thing formed by the enlargement, broadening, or development of something
expansionthe act of expanding
expansionExtension of a state's territory by encroaching on that of other nations, pursued as a political strategy
expansionThe increase in the volume of fuel on combustion in the cylinder of an engine, or the piston stroke in which this occurs