Of an alliance, agreement, or promise: secure, binding. Also of an ally, partner, etc.: closely connected.

In predicative use. Of a person: held in particular esteem or affection; particularly close or dear to; particularly intimate with. Obsolete.

Of a person: closely attached to, very intimate or familiar with, another. Of friendship, etc.: close, intimate, familiar. Obsolete.

Belonging to the inner circle of one's acquaintance or friends; closely associated or acquainted; intimate, familiar, confidential. Obsolete…

Closely attached, intimate, confidential: said of persons and relations.

Of a friend or a friendship: close, familiar, intimate. Now passing into sense A. 5a.

Connected with, intimately acquainted with, attached to (a person or group of persons).

Originally U.S. Intimately or closely allied, on friendly terms, with another.