1. past tense and past participle of underlay; placed or put something under another thing as a support or foundation

Examples

• The carpet was underlaid with thick padding for comfort.
• The foundation was underlaid with gravel for proper drainage.
• She underlaid the delicate fabric with tissue paper.
• The wooden floor was underlaid with insulation material.
• The artist underlaid the painting with a base coat of white.
• The construction crew underlaid the concrete with steel mesh.