What does the term 'overcast clouds' signify in a weather report?

The term 'overcast clouds' in a weather report signifies that clouds are completely covering the sky, resulting in uniform overcast conditions. This means there is little to no sunlight penetrating through the clouds, generally leading to a gray, featureless sky. Such conditions can impact flight operations, as they may restrict visibility and influence altimeter settings for gliding and other aviation activities. Understanding this term is crucial for pilots, as overcast conditions often indicate a lack of thermal activity, which is essential for gliding, affecting lift and overall flight planning.

The other options describe different cloud conditions, such as clear skies, scattered clouds, or negligible cloud presence, but do not accurately capture the meaning of 'overcast clouds.' Recognizing this distinction helps pilots assess weather conditions effectively during flight operations.