Of a (material or immaterial) thing: recently formed, introduced, created, etc.; new.

That has newly sprung into existence; that has lately sprung up.

Created or begun lately; that has emerged or developed in the near past, newly arisen; †newborn (obsolete).

Newly risen; that has just risen.

Of things: Lately come into existence or notice; new-fangled.

Of a calf, lamb, etc.: newly dropped, newborn. Obsolete.

In started-up, in senses corresponding to those of to start up at start, v. phrasal verbs 1.