To find definitions on Google, simply type the word you are trying to define into the search box. Google usually will offer a suggestion if you misspell the word in the search bar.
Once you have typed the word into the search bar and hit "enter," usually a definition will pop up. You can also go to dictionary sites such as www.dictionary.com to help you define and spell words. You can use sites such as this to find synonyms, word origin and history, word usage and parts of speech. You can even type in the meaning of a word and generally a definition suggestion will appear.