Final answer:
The important role of the word 'meaning' is revealed in the analysis of proofreading errors.
Step-by-step explanation:
The word that plays an important role in proofreading errors is meaning. When proofreading a text, understanding the meaning of words is crucial for identifying errors in comprehension or interpretation. Word choice and diction impact the overall clarity and effectiveness of a text, making the meaning of words a key factor in analyzing proofreading errors.