Some internet dictionaries can save you a lot of time. You should also learn how to use a normal dictionary well. It is faster and always works.How to Use a Dictionary:
Start by trying to always open as close to the word as you can if you are looking for "APPLE" it will be near the end of the English "A" section.
Always Look for a word by comparing it to the word in the top corners of the pages the word there is the first or last word on the page.
Never flick through page after page or "read" it like a book. You should aim to find the word by opening the book and turning pages just once or twice.