Definition of "IRS"
IRS
/ˈaɪ.ɑɹ.ɛs/
proper noun
(US) : Initialism of Internal Revenue Service.
(India) : Initialism of Indian Revenue Service.
noun
uncountable
(aviation) Initialism of inertial reference system.
(engineering) Initialism of Interface Requirements Specification.
(basketball) Initialism of instant replay system.
noun
plural IRSs
(finance) Initialism of interest rate swap.