haplography Syllabification: (hap·log·ra·phy)Pronunciation: /hapˈlägrəfē/Definition of haplography noun the inadvertent omission of a repeated letter or letters in writing (e.g., writing philogy for philology). Origin: late 19th century: from Greek haploos 'single' + -graphyhaplography in other Oxford dictionaries Definition of haplography in the British & World English dictionary