lack-love adjective 1noun 1forms 3 adjective1 •Uncaring; indifferent to love; loveless.And I in exile's lack-love loneliness / Must sigh for joy if yet I may not sing— — 1917 noun1 •(no longer used) A heartless person; someone who is uncaring and indifferent to love.Pretty soul! she durst not lie / Near this lack-love, this kill-courtesy. — 1595 formslack-loves · more lack-love · most lack-love