Definition of "Depress" :
verb: lessen the activity or force of
"The rising inflation depressed the economy."
verb: press down
"Depress the space key."
verb: cause to drop or sink
"The lack of rain had depressed the water level in the reservoir."
verb: lower someone's spirits; make downhearted
"These news depressed her."
verb: lower (prices or markets)
"The glut of oil depressed gas prices."