Definition of permissive
2a
: granting or tending to grant permission : tolerant
3
: allowing discretion : optional
reduced the permissive retirement age from 65 to 62
4
: supporting growth or genetic replication (as of a virus)
permissive host cells
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Merriam-Webster unabridged
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Time Traveler for permissive
The first known use of permissive was in the 15th century
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