(astronomy) Isolated neutron star. / (aviation) Initialism of inertial navigation system. / (US, historical) Immigration and naturalization service.

Abbreviation of insurance.

(computing) insert

plural of in

plural of be-in

Abbreviation of Insert.

(China) Short for Instagram.

(law) Abbreviation of insurance.

present participle of inn

(baseball) A period of play in which members of a visiting baseball team attempt to hit a baseball pitched by the opposing home team until three players are called out, followed by a similar attempt by members of the home baseball team against the visiting team's pitching. There are nine or more innings in a regulation baseball game.