hirundine /hɪˈɹʌndʌɪn/adjective 1noun 1forms 1 adjective1 •Of or relating to a swallow (the bird); of or relating to the family Hirundinidae.I have not met with these hirundine star-titles except in these two instances, and I think them both incorrect. — 1899 noun1 •A member of the swallow family‘...and so, gentlemen, I believe I may confidently state that the hibernation of swallows, and of all other hirundines, is conclusively proved,’ said Mr Lamb, with a defiant glare at his audience. — 1973 formshirundines