What is the meaning of In_turn?

One after the other; one at a time; in succession; successively.

In due order; in proper sequence; in a determined or measured sequence, as a waiting line or queue.

In response; in return.

Having a relationship sequentially comparable to one just mentioned; accordingly or similarly, with respect to sequence, precedence, or hierarchy.

Kibbitzer 51, “In turn”,

Source: wiktionary.org