Synonyms: speculative, questioning, wondering, inquisitive
Definition: showing curiosity
Usage: if someone saw a man climbing a light post they might get inquisitive; raised a speculative eyebrow
Similar words: curious
Definition: eager to investigate and learn or learn more (sometimes about others' concerns)
Usage: a curious child is a teacher's delight; a trap door that made me curious; curious investigators; traffic was slowed by curious rubberneckers; curious about the neighbor's doings