Mediaeval \Me`di*ae"val\ (m[=e]`d[i^]*[=e]"val; 277), a. [L. medius middle + aevum age. See Middle, and Age.]

Of or relating to the Middle Ages; as, mediaeval architecture. [Written also medieval.]

[1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

mediaeval adj
1: relating to or belonging to the Middle Ages; "Medieval scholars"; "Medieval times" [syn: medieval]
2: as if belonging to the Middle Ages; old-fashioned and unenlightened; "a medieval attitude toward dating" [syn: medieval, gothic]

Source: WordNet (r) 2.0
 

Mediaeval \Me`di*[ae]"val\, a. [L. medius middle + aevum age. See Middle, and Age.]

Of or relating to the Middle Ages; as, medi[ae]val architecture. [Written also medieval.]

Source: Webster's Revised Unabridged Dictionary (1913)