/ liːˈgæləti; NAmE / noun ( pl. -ies )
1.
[ U ] the fact of being legal :
They intended to challenge the legality of his claim in the courts.
The arrangement is of doubtful legality.
2.
[ C , usually pl. ] the legal aspect of an action or a situation :
You need a lawyer to explain all the legalities of the contracts.
—compare illegality
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WORD ORIGIN
late Middle English : from French légalité or medieval Latin legalitas relating to the law, from Latin legalis , from lex , leg- law.