Meaning of “force” - Learner’s Dictionary

force

noun us uk /fɔːs/
Police were accused of using excessive force.The force of the blast shook the entire area.They'd been caught in the full force of the gale.The seal had been tossed over the sea wall by the force of the waves.He was thrown to the floor with such force that he lost consciousness.
POWER [ U ]

B2 physical power or strength:

The force of the explosion shattered every window in the street.
The army has seized power by force.
ORGANIZED GROUP [ C ]

B2 a group of people organized to work together for a particular purpose, for example in military service:

the Royal Air Force
a skilled work force
INFLUENCE [ C, U ]

power and influence, or a person or thing that has it:

the forces of good/evil
in/into force

If a law, rule, etc is in force, it is being used, and if it comes into force, it starts to be used:

The new law came into force in April.
be out in force

to be somewhere in large numbers:

Photographers were out in force at the palace today.

(Definition of “force noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)