Webster’s Revised Unabridged Dictionary · 1913 Seraphim Ser′a·phim (sĕr′ȧ·fĭm), n. The Hebrew plural of Seraph. Cf. Cherubim. ☞ The double plural form seraphims is sometimes used, as in the King James version of the Bible, Isa. vi. 2 and 6. ‹ Seraphicism Seraphina ›