What is a dictionary used for?

A dictionary is a reference book that provides definitions, meanings, pronunciations, and sometimes additional information about words. Its primary function is to help users understand the usage of words in language, making it an essential tool for students, writers, and anyone who wants to enhance their vocabulary.

By looking up a word in a dictionary, a person can gain clarity on what the word signifies, which can aid in reading comprehension and effective communication. This makes it clear why the answer about looking up definitions and meanings of words is the most accurate choice.

While conducting research, creating story plots, and editing essays are valuable skills, they are not the primary functions of a dictionary. Each of those activities may involve using a dictionary at some point, but the key role of a dictionary specifically focuses on providing word definitions and meanings.