Definition of "gayly"

Gayly to bourgeon and broadly to grow.

1810, Walter Scott, “(please specify the canto number or page)”, in The Lady of the Lake; […], Edinburgh: […] [James Ballantyne and Co.] for John Ballantyne and Co.; London: Longman, Hurst, Rees, and Orme, and William Miller, (please specify the stanza number)

In the lightness of my heart I sang catches of songs as my horse gayly bore me along the well-remembered road.

1852, Mrs M.A. Thompson, “The Tutor's Daughter”, in Graham's American Monthly Magazine of Literature, Art, and Fashion‎, page 266

Gayly-dressed mavournins and blaring bands stepped lively along Fifth Avenue.

1958, Printers' Ink, volume 262, page 28