fugitive

(noun) someone who flees from an uncongenial situation. Synonyms: runaway, fleer. Examples: "Fugitives from the sweatshops."

(noun) someone who is sought by law officers; someone trying to elude justice. Synonyms: fugitive from justice.

(adj) lasting for a markedly brief time. Synonyms: fleeting, momentaneous, momentary. Examples: "A fleeting glance." "Fugitive hours." "Rapid momentaneous association of things that meet and pass." "A momentary glimpse."