What does 来 mean?
来 is a Japanese noun meaning “next ~” in English. It can also be translated as “since (e.g. last month)” depending on context. It is written as 来 in kanji, らい～ in hiragana, and rai～ in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
来年末までで、ここで働き始めてどれくらいの期間になりますか。
How long will you have been working here by the end of next year?