1. in a fleeting or brief manner; transiently
2. in a manner suggestive of someone fleeing or evading; evasively

Examples

• The memory appeared fugitively in her mind before fading away.
• He glanced fugitively over his shoulder, worried he was being followed.
• The sunset's colors were fugitively beautiful, lasting only minutes.
• She smiled fugitively, as if sharing a secret she shouldn't reveal.
• The idea crossed his thoughts fugitively, never quite taking hold.
• He moved fugitively through the crowd, trying not to be noticed.