0 (of something bad) getting worse quickly and in an uncontrolled way: --
Disease is rampant in the overcrowded city.
He said that he had encountered rampant prejudice in his attempts to get a job.
Rampant inflation means that our wage increases soon become worth nothing.
rampant corruption
1 (of an animal represented on a coat of arms) standing on its back legs with its front legs raised: --
a lion rampant
2 happening a lot or becoming worse, usually in a way that is out of control: --
3 used to describe something bad that gets worse very quickly and in an uncontrolled way: --
rampant inflation/commercialism/consumerism
The result is rampant corruption, 'crony capitalism', and all manner of fraud and cheating.
Scabies was rampant and affected whole families and large groups of children.
The principle of allowing the individual expression of sentiment had allowed the rampant expression of poor taste.
The rampant absenteeism of veteran regidores was another sign of crisis.
In spite of structural change and active community works' programmes over the past 20 years poverty remains rampant.
The combination of poor record-keeping in government tax departments, weak laws and rampant tax evasion, has undermined government revenue collection.
Democratisation was burdened by rampant popular distrust and cynicism about the viability, integrity and capacities of the new government.
In any event the phenomenon is rampant and appears to be irreversible.