An immature, naïve or inexperienced person.
A young bird which has just developed its flight feathers (notably wings).
An insect that has just fledged, i.e. undergone its final moult to become an adult or imago.
Emergent or rising.
Untried or inexperienced.
A person (of either sex) entering the first year of an institution, especially a high school (ninth grade for US and Canada, grade 7 for Philippines), a university, or legislative body.