val·ley 
/ˈvæli/ noun
plural val·leys /ˈvæli/ noun [count] 1 : an area of low land between hills or mountains
▪ the Shenandoah (River) Valley — see color picture; see also rift valley 2 : a low period, point, or level
▪ There are peaks and valleys [=high and low periods] in electricity usage throughout the year.
▪ the Shenandoah (River) Valley — see color picture; see also rift valley
▪ There are peaks and valleys [=high and low periods] in electricity usage throughout the year.
