Platonic

Affectionate but non-sexual — used most often of close friendships.

Origin

Named for the Greek philosopher Plato, whose Symposium describes a kind of love that ascends from physical desire to the contemplation of beauty itself. Renaissance writers narrowed and softened the meaning to 'love without sex'. Plato himself was not talking about platonic friendships in the modern sense.

Modern usage

Standard English for close, non-romantic relationships. 'A platonic roommate', 'a platonic best friend'. Carries a faint defensive note when said aloud — usually used to head off the implication of more.

Soulmate

A romantic partner who feels destined — the singular 'one'.

phrase

Love & Relationships

Friend Zone

Being kept as a friend by someone you want a romantic relationship with.

concept

Philosophy & Psychology

Plato's Cave

An allegory for living inside an illusion you mistake for reality.

Allusionary