Often when reading an article online or writing we would like to look up the definition of a word.  To do so easily without having to open another application try this quick tip:

While typing or reading, highlight the word you would like to look up and press either

Command+ Control + D         OR            Control-click on the highlighted word and select “Look Up”

dictionarymeanings-582x279                Dictionary lookup

You should see results that look like this: