Definition of "over-fired" [over-fired]

• In ceramics, exposed to too great a heat in firing.

The Century Dictionary (Public Domain)

• "This includes fragments of huge vats filled with residue from the production of a grain-based food, probably some sort of porridge, and the firebars used to support the vats, as well as pottery-making tools and over-fired "wasters.""
• "For lime produced by less sophisticated methods, which may contain only 55% quick lime (the rest being made up of unfired or over-fired components), the proportion must be increased."
• "Before collection or despatch, under - and over-fired bricks must be discarded and the remainder, if of variable quality, should be sorted out into good quality, ‘seconds’ and soft-fired bricks."