not familiar or conversant with (someone or something)
(of people) not having met or been introduced
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use unacquainted in a sentence
Those unacquainted with the chef can visit his website to view recipes and tutorials in French and English.
Many of them however are of rude workmanship and might have been fashioned by some of the tribe unacquainted with pipe-making.Tobacco; Its History, Varieties, Culture, Manufacture and Commerce | E. R. Billings.
A learned Professor declared that no person unacquainted with astronomy could correlate “Moon” to “Omnibus.”Assimilative Memory | Marcus Dwight Larrowe (AKA Prof. A. Loisette)
Be careful that none of the company are left to mope alone from being unacquainted with other guests.The Ladies' Book of Etiquette, and Manual of Politeness | Florence Hartley
There are both gold and silver mines; but with their relative value or productions I am unacquainted.The Expeditions of Zebulon Montgomery Pike, Volume II (of 3) | Elliott Coues
As many of those who read my journal may be unacquainted with Florida, they may like to have a short description of the country.In the Wilds of Florida | W.H.G. Kingston