The four varga (groups, or orders), i. e. bhiksu, bhiksunī, upāsaka and upāsikā, monks, nuns, male and female devotees. Another group, according to Tiantai's commentary on the Lotus, is 發起衆 the assembly which, through Śāriputra, stirred the Buddha to begin his Lotus Sūtra sermons; 當機衆 the pivotal assembly, those who were responsive to him; 影向衆 the reflection assembly, those like Mañjuśrī, etc., who reflected on, or drew out the Buddha's teaching; and 結緣衆 those who only profited in having seen and heard a Buddha, and therefore whose enlightenment is delayed to a future life.

A Dictionary of Chinese Buddhist Terms, William Edward Soothill and Lewis Hodous

catasraḥ parṣadaḥ, catuṣ-pariṣad*, catuṣṭaya, cātuṣpathika.

佛教漢梵大辭典, 平川彰 Buddhist Chinese-Sanskrit Dictionary, Akira Hirakawa

p 623