1. most covered with clouds; having the most clouds
Usage: superlative form of cloudy
2. most unclear or confused; most difficult to understand
Usage: figurative use
3. most opaque or murky in appearance
Usage: describing liquids or substances

Examples

• Today was the cloudiest day of the week.
• The cloudiest skies appeared just before the storm.
• His explanation was the cloudiest part of the presentation.
• The water looked cloudiest near the bottom of the lake.
• This is the cloudiest weather we’ve had all month.
• Her memory of that day remains the cloudiest of all.