Definition of app in English:

app

Syllabification: app

noun

Computing
A self-contained program or piece of software designed to fulfill a particular purpose; an application, especially as downloaded by a user to a mobile device: apparently there are these new apps that will actually read your emails to you

Definition of app in:

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Word of the day fioritura
Pronunciation: fɪˌɔːrɪˈt(j)ʊərə
noun
an embellishment of a melody...