lifemate

plural lifemates

1. A companion for life.

   GWF 45 desires friends with goal for lifemate to share and care for keeps.

   1981 April 18, “Personal advertisement”, in Gay Community News, page 14

   2 more examples

   The truth seems to be, however, that when he casts his leaves forth upon the wind, the author addresses, not the many who will fling aside his volume, or never take it up, but the few who will understand him better than most of his schoolmates or lifemates.

   1850, Nathaniel Hawthorne, “Introduction”, in The Scarlet Letter, a Romance, Boston, Mass.: Ticknor, Reed, and Fields, →OCLC

   He’s a warlock—albeit a mediocre one. His next-door neighbor and platonic lifemate, poised, purple-clad witch Mrs. Zimmerman (Cate Blanchett), is much more powerful.

   2018 September 19, Katie Rife, “Eli Roth, of all directors, brings Amblin magic to the kid-lit horror of The House With A Clock In Its Walls”, in The Onion AV Club, archived from the original on 20 Sep 2018