n.
Pronunciation: ' tr ī - ˌ graf
Function: noun
Date: circa 1836
1 : three letters spelling a single consonant, vowel, or diphthong < eau of beau is a trigraph >
2 : a cluster of three successive letters < the, ion, and ing are high frequency trigraph s >
– tri · graph · ic \ ( ˌ )tr ī - ' gra-fik \ adjective