The Collaborative International Dictionary of English v.0.48:

Amity \Am"i*ty\, n.; pl. Amities. [F. amiti['e], OF.
   amisti['e], amist['e], fr. an assumed LL. amisitas, fr. L.
   amicus friendly, from amare to love. See Amiable.]
   Friendship, in a general sense, between individuals,
   societies, or nations; friendly relations; good
   understanding; as, a treaty of amity and commerce; the amity
   of the Whigs and Tories.
   [1913 Webster]

         To live on terms of amity with vice.     --Cowper.
   [1913 Webster]

   Syn: Harmony; friendliness; friendship; affection; good will;
        peace.
        [1913 Webster]

WordNet (r) 3.0 (2006):

amity
    n 1: a cordial disposition [syn: amity, cordiality]
    2: a state of friendship and cordiality