Before a man can speak on any subject, it is necessary to be acquainted with it. Locke. [ 1913 Webster ]

A man of sorrows and acquainted with grief. Isa. liii. 3. [ 1913 Webster ]

2. To communicate notice to; to inform; to make cognizant; -- followed by with (formerly, also, by of), or by that, introducing the intelligence; as, to acquaint a friend with the particulars of an act. [ 1913 Webster ]

Acquaint her here of my son Paris' love. Shak. [ 1913 Webster ]

I must acquaint you that I have received
New dated letters from Northumberland. Shak. [ 1913 Webster ]

3. To familiarize; to accustom. [ Obs. ] Evelyn. [ 1913 Webster ]

To be acquainted with, to be possessed of personal knowledge of; to be cognizant of; to be more or less familiar with; to be on terms of social intercourse with. [ 1913 Webster ]

Syn. -- To inform; apprise; communicate; advise. [ 1913 Webster ]

Contract no friendship, or even acquaintance, with a guileful man. Sir W. Jones. [ 1913 Webster ]

2. A person or persons with whom one is acquainted. [ 1913 Webster ]

Montgomery was an old acquaintance of Ferguson. Macaulay. [ 1913 Webster ]

☞ In this sense the collective term acquaintance was formerly both singular and plural, but it is now commonly singular, and has the regular plural acquaintances. [ 1913 Webster ]

To be of acquaintance, to be intimate. --
To take acquaintance of or
with, to make the acquaintance of. [ Obs. ] [ 1913 Webster ]

Syn. -- Familiarity; intimacy; fellowship; knowledge. -- Acquaintance, Familiarity, Intimacy. These words mark different degrees of closeness in social intercourse. Acquaintance arises from occasional intercourse; as, our acquaintance has been a brief one. We can speak of a slight or an intimate acquaintance. Familiarity is the result of continued acquaintance. It springs from persons being frequently together, so as to wear off all restraint and reserve; as, the familiarity of old companions. Intimacy is the result of close connection, and the freest interchange of thought; as, the intimacy of established friendship. [ 1913 Webster ]

Our admiration of a famous man lessens upon our nearer acquaintance with him. Addison. [ 1913 Webster ]

We contract at last such a familiarity with them as makes it difficult and irksome for us to call off our minds. Atterbury. [ 1913 Webster ]

It is in our power to confine our friendships and intimacies to men of virtue. Rogers. [ 1913 Webster ]