Definition of "newcomer"

Welcome, we²l'ku²m. a. Received with gladneſs, admitted willingly, grateful […] Welcome, we²l'ku²m. interj. A form of ſalutation uſed to a new comer.

1791, John Walker, A Critical Pronouncing Dictionary […] ‎, London: Sold by G. G. J. and J. Robinſon, Paternoſter Row; and T. Cadell, in the Strand, page 550

This new-comer was a man who in any company would have seemed striking. In complexion fair, and with blue or gray eyes, he was tall as any Viking, as broad in the shoulder.

1910, Emerson Hough, chapter I, in The Purchase Price: Or The Cause of Compromise, Indianapolis, Ind.: The Bobbs-Merrill Company

As soon as Julia returned with a constable, Timothy, who was on the point of exhaustion, prepared to give over to him gratefully. The newcomer turned out to be a powerful youngster, fully trained and eager to help, and he stripped off his tunic at once.

1963, Margery Allingham, chapter 19, in The China Governess‎