1. slightly; faintly
    • 庭には雪がうっすらと積もっていた
    • The garden was covered with a thin coat [layer] of snow.
    • うっすらと東の空が白み始めた
    • The eastern sky began to show faint signs of light.
    • 少女はうっすらと化粧をしていた
    • The girl was lightly made up.
    • 彼女はうっすらとほおを赤らめた
    • She blushed faintly.
    • 彼女はうっすらと目を開けた
    • She opened her eyes slightly [partway].