An insect that has just fledged, i.e. undergone its final moult to become an adult or imago.
A young bird which has just developed its flight feathers (notably wings).
An immature, naïve or inexperienced person.
Emergent or rising.
Untried or inexperienced.
An animal that is between one and two years old; one that is in its second year (but not yet two full years old).
A racehorse that is considered to be one year old until a subsequent January 1st.
A sophomore at West Point military academy.