'Tammuz' definitions:

Definition of 'Tammuz'

noun

The tenth month of the civil year; the fourth month of the ecclesiastic year (in June and July) [syn: Tammuz, Thammuz]

noun

Sumerian and Babylonian god of pastures and vegetation; consort of Inanna [syn: Dumuzi, Tammuz]

From: GCIDE

Thammuz \Tham"muz\, Tammuz \Tam"muz\, n. [Heb. thamm[=u]z.]
1. A deity among the ancient Syrians, in honor of whom the Hebrew idolatresses held an annual lamentation. This deity has been conjectured to be the same with the Phoenician Adon, or Adonis. --Milton. [1913 Webster]
2. The fourth month of the Jewish ecclesiastical year, -- supposed to correspond nearly with our month of July. [1913 Webster]

Tammuz a corruption of Dumuzi, the Accadian sun-god (the Adonis of the Greeks), the husband of the goddess Ishtar. In the Chaldean calendar there was a month set apart in honour of this god, the month of June to July, the beginning of the summer solstice. At this festival, which lasted six days, the worshippers, with loud lamentations, bewailed the funeral of the god, they sat "weeping for Tammuz" (Ezek. 8:14).
The name, also borrowed from Chaldea, of one of the months of the Hebrew calendar.