1. in a smooth manner; without roughness, bumps, or interruptions
2. without problems or difficulties; successfully
3. in a calm, confident, or charming way

Examples

• The car ran smoothly after the tune-up.
• The meeting went smoothly without any major disagreements.
• She smoothly handled the difficult customer complaint.
• The ice skater glided smoothly across the rink.
• The project proceeded smoothly from start to finish.
• He smoothly changed the subject when things got tense.
• The engine runs smoothly at highway speeds.