Definition of "agleam"

She was on her knees with her arms round Andrew's neck before he could prevent her. Her eyes were tearfully agleam, as, audibly reckless, she sobbed[.]

1907, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 159

[Magazine staffer about his political team:] Pencils at the ready, keen brains agleam behind intelligent horn rims, these experts spread out to ravel the loose ends of White-Housing, web-spinning spiders for [the presidential candidate].

1960 May 28, Walt Kelly, Pogo, comic strip, page 149

It was a dark Saturday night last month on the Lower East Side of Manhattan, where Saturday nights can get very dark, but Sabrina Brier, in a rhinestone necklace and strapless plaid pantsuit, was agleam onstage at a basement comedy club called Caveat warming up the crowd.

2023 March 14, Alexandra Jacobs, “Your Annoying Roommate Is Slaying on TikTok”, in The New York Times‎