Definition of FOSS in English:

FOSS

Syllabification: FOSS

abbreviation

Computing
Free and open-source software: FOSS has worked well for some categories of software, but not for others

Definition of FOSS in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
adjective
(of a person or their actions) criminal; villainous