Mahāvagga

Suttapiṭaka · Khuddakanikāya · Paṭisambhidāmagga · Vol. 31 · Section 275

[275] "World" (loka): the world of aggregates (khandha), the world of elements (dhātu), the world of sense bases (āyatana), the world of failing existence (vipattibhava), the world of the origination of failing existence (vipattisambhava), the world of excelling existence (sampattibhava), the world of the origination of excelling existence (sampattisambhava). One world: all beings subsist by nutriment (āhāra). Two worlds: name (nāma) and form (rūpa). Three worlds: the three feelings (vedanā). Four worlds: the four nutriments. Five worlds: the five aggregates subject to clinging. Six worlds: the six internal sense bases. Seven worlds: the seven stations of consciousness (viññāṇaṭṭhiti). Eight worlds: the eight worldly conditions (lokadhamma). Nine worlds: the nine abodes of beings (sattāvāsa). Ten worlds: the ten sense bases. Twelve worlds: the twelve sense bases. Eighteen worlds: the eighteen elements.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.