When looking up vocabulary words, it is best to find the definition in the source listed by the teacher (for example, the science glossary or classroom student dictionary). However, if you need a last-minute solution, this website is excellent for vocabulary definitions. However, be sure to select "Beginner's Dictionary" underneath the word search box before you push GO. Otherwise, your child will receive a grown-up definition. The Beginner's Dictionary search provides definitions that are very similar to our classroom dictionaries.