1 demote, dethrone, humble, lower, reduce, displace, depose, dispossess, disfranchise or disenfranchise, US military bust; Colloq bring or take down a peg:
He was downgraded from supervisor to foreman.
2 belittle, minimize, play down, disparage, decry, denigrate, run down, US and Canadian downplay:
How could she downgrade her own sister?
3 descent, decline, declension, (downward) slope, gradient, grade, inclination:
Apply the brake as you approach the downgrade.
4 on the downgrade. on the wane, waning, declining, falling, slipping, falling off, losing ground, going downhill, US and Canadian on the skids:
After the drug scandal, her popularity was on the downgrade.