TRANSMITTER By N., Pam M.S. - April 29, 2013 noun. 1. a tool or instrument which encodes and passes a message or urgency to a receiver or helps in its transmission. 2. a neurotransmitter. TRANSMITTER: "The transmitters have gone awry." Related Psychology Terms RECEIVER ANTICIPATORY ATTITUDE CHANGE ALLOGROOMING TELECOMMUNICATION DEVICE (TDD) BOOMERANG EFFECT IRIDOLOGY SLEEPER EFFECT OPTICAL AXIS PERCIPIENT BEHAVIOR CHECKLIST Cite this page: N., Pam M.S., "TRANSMITTER," in PsychologyDictionary.org, April 29, 2013, https://psychologydictionary.org/transmitter/ (accessed March 30, 2020).