I. əˈlau̇əbəl adjective
Etymology: Middle English, from Middle French allouable, from allouer to approve + -able
1. obsolete : worthy of praise : laudable
2. : permissible : not forbidden : not unlawful or improper
the allowable rate of continuous descent of commercial airliners — H.G.Armstrong
allowable income tax deductions
a degree of freedom allowable among friends
• al·low·a·ble·ness noun -es
II. noun
( -s )
: the amount of oil that an oil-well operator is permitted by law to take from a given well in any one day