IPA: /ˌoʊvərˌstɪmjuˈleɪʃən/
KK: /oʊvərˌstɪmjuˈleɪʃən/
A condition where someone experiences too much stimulation, which can lead to feelings of being overwhelmed or anxious.
After spending hours in the crowded mall, I felt a sense of overstimulation that made it hard to concentrate.
Overstimulation → It is formed from "over-" (meaning excessively) and "stimulus" (from Latin *stimulus*, meaning a goad or incentive). The word refers to an excessive amount of stimulation or sensory input.
Think of 'over' meaning excessively and 'stimulus' as something that provokes a response — overstimulation means too much provocation for your senses.