Definitions
1.NounA period of low alternating current line voltage, causing a reduction in illumination."When demand for electricity exceeds the available supply, a brownout occurs."
2.NounA temporary dimming of vision, usually with a brown hue and accompanied by loss of peripheral vision or tunnel vision."On rising suddenly from her chair she experienced a brownout and had to sit down again quickly."
3.NounA temporary closing of a fire station, usually due to budget restrictions."Fire departments across the country have been forced to rely on rolling brownouts because of the recession."
4.NounA power outage during the day; distinguished from a blackout, which occurs at night.
5.NounA moment or period where something is weakened, diminished or less effective.
6.NounA blackout, regardless of time of day.