In C.S. Lewis’s The Four Loves, storge means affectionate family love.
Lewis discusses four Greek terms as ways of describing different forms of human love: storge, philia, eros, and agape. Storge is the natural affection found among family members and close companions. Lewis presents it as a quiet, familiar attachment that can arise without deliberate choice.
Philia describes friendship, eros describes romantic or sexual love, and agape refers to charitable or self-giving love. Lewis does not treat these categories as completely isolated; real relationships can involve several kinds of love at once. The distinctions are intended to clarify patterns of affection rather than function as a strict scientific classification.
The Four Loves developed from a 1958 BBC television program and was published as a book in 1960. Its terminology is frequently discussed in Christian writing, although the Greek words have broader histories outside Lewis’s particular presentation.