There are some websites that offer "context translations". That is, it offers numerous sentences where the word or phrase shows up in your language and in the language you are learning. However, this is mostly limited to popular languages and even then, they don't always work well.
Likewise, you can use context clues in the sentence where you found the word to help you understand its meaning.
And finally, you can ask a native speaker, either a language partner or a teacher/tutor.