How do you access the dictionary and thesaurus in Word?
A. Click the Dictionary/Thesaurus icon in the upper-left page.
B. In the View tab, click the Dictionary icon.
C. In the Review tab, click the Define icon next to the Spelling & Grammar tool. D. In the Insert tab, click the Help icon to the left of the Spelling & Grammar tool.

Respuesta :

C. You actually find the Dictionary/Thesaurus in the Review Tab under the Proofing window. This is used when you have completed your writing and are attempting to add color to the vocabulary you have used. 
I noticed the last person to post here was incorrect, so I hope I have helped in time.