Which definition reflects the word "perilous"?

The word "perilous" means full of danger or risk, making option B the correct definition. This term is often used to describe situations or actions that pose a significant threat to safety or well-being. For instance, a perilous journey across a stormy sea highlights the potential hazards one might face.

The other definitions do not align with the meaning of "perilous." A state characterized by excessive precision would imply meticulousness or accuracy, which is unrelated to danger. Examining something with attention suggests a careful analysis or observation, lacking any connotation of risk. Similarly, being free from disturbance denotes a peaceful or untroubled state, directly opposite to the concept of danger present in "perilous." Thus, B accurately captures the essence of the word.