tadEnglishOxford Dictionary of Englishtad /tad / informal ▸ (a tad) adverb to a small extent; somewhat: Mark looked a tad embarrassed. ▸ noun [in singular] a small amount of something: crumpets sweetened with a tad of honey. – ORIGIN late 19th century (denoting a small child): origin uncertain, perhaps from tadpole. The current usage dates from the 1940s.