People have friends that they know from outside of work.
1. What does it mean by the phrase 'outside fo work' as written in the above sentence?
2. What is the part of speech of the word 'outside', noun, preposition, or adverb?
1. It means they are NOT people they know and are friends with because they work together. They are friends with them, but they know them from other contexts that have nothing to do with work.
2. Noun. Object of the preposition "from."