1. superlative form of pillow; most soft, cushioned, or comfortable like a pillow
Usage: informal; comparative form is 'pillowier'

Examples

• This is the pillowiest mattress I've ever slept on.
• The pillowiest clouds floated across the sky.
• She sank into the pillowiest armchair in the living room.
• These pillowiest pillows make the perfect nap spot.
• The pillowiest snow fell softly on the ground.
• That's the pillowiest couch I've ever felt.