1. in a way that produces much sound; with great volume or intensity of sound
2. in a way that attracts attention; conspicuously or boldly

Examples

• The children were laughing loudly in the playground.
• She spoke loudly so everyone could hear her announcement.
• The music was playing too loudly for the neighbors.
• He knocked loudly on the door until someone answered.
• The protesters chanted loudly outside the building.
• Her bright yellow dress stood out loudly against the neutral colors.