inletPronunciation: /ˈɪnlɛt/Translate inlet | into German | into Italian | into Spanish Definition of inlet noun 1a small arm of the sea, a lake, or a river. 2a place or means of entry:an air inlet 3(chiefly in tailoring and dressmaking) a piece of material inserted into a garment. Origin: Middle English (denoting admission): from in + the verb let1inlet in other Oxford dictionaries Definition of inlet in the US English dictionary