The term "irrational" refers to thoughts, behaviors, or decisions that lack logical reasoning or sound judgment. It often describes actions that are not based on reason or are contrary to rational thought. For example, someone might make an irrational choice by acting on impulse rather than considering the consequences. In psychology, irrationality can be linked to cognitive biases, which are systematic patterns of deviation from norm or rationality in judgment. These biases can lead individuals to make decisions that are not in their best interest, such as in the case of cognitive dissonance or confirmation bias. Understanding irrationality helps in improving decision-making processes.