Somewhere Else, Other Place, Elsewhere
When you're talking about some other place you're talking about another place.
This is a jukugo word, which you would normally expect to use the on'yomi readings from the kanji. With this word, however, the on'yomi readings are rarely used now, so they sound rather out of date. Here's a mnemonic to help you remember the more common reading in contemporary Japanese:
Another place you saw (よそ) always seems better. In other words, the grass is greener somewhere else you saw!
about another place
person from another place, an outsider
Not here, let’s go to another store somewhere else.
Their house, their rules. Our house, our rules.
My mother is from around here. Don't say she's a person from somewhere else.