Final answer:
The word 'idyllic' in the context of the question indicates a day that is extremely pleasant, peaceful, and perfect for enjoying the outdoors.
Step-by-step explanation:
Using context clues to define the bolded word from the phrase "It was an idyllic day - sunny, warm, and perfect for a walk in the park", we can infer that idyllic means extremely pleasant, peaceful, or picturesque. The word is enhanced by descriptive elements such as "sunny" and "warm", suggesting the kind of day that is not only perfect in terms of weather but also evokes a sense of well-being and contentment. This interpretation aligns with the literary passages, illustrating that idyllic scenarios often involve beautiful natural settings, harmonious weather, and a sense of tranquility.