overhead steam engine

A form of engine in which the cylinder is above the crank, and the thrust motion downward. Not uncommon with trunk and oscillating engines. ō-ver-hëar', v. t. [Eng. over, and hear. ] 1. To hear persons whom or things which are not intended to be heard; to hear by accident or strata gem. "I "I will overhear their conference." Shakesp.: Midsummer Night's Dream, ii. 1. *2. To hear from beginning to end; to hear told. overheard what you shall overhear ." Shakesp.: Love's Labor's Lost , v. 2. ō-ver-heat', v . t . [Eng. over , and heat , v.] To heat too much or to exce . "The false fire of an overheated mind." Cowper: Conversation , 668. ō'-ver-heat, s . [Eng. over , and heat .] Too great heat, exce ive heat. [OVERCOLD.]