to one's knowledge, according to the information available to one: To my knowledge he hasn't been here before.
Origin: 1250–1300;Middle Englishknouleche, equivalent to know(en) to know1 + -leche, perhaps akin to Old English-lāc suffix denoting action or practice, cognate with Old Norse (-)leikr; cf. wedlock
Related forms
know·ledge·less, adjective
pre·knowl·edge, noun
su·per·knowl·edge, noun
Synonyms 1. See information. 4. understanding, discernment, comprehension; erudition, scholarship.