1. The quality or state of being easily annoyed, angered, or impatient
His irritability increased as the day went on.
Sua irritabilidade aumentou conforme o dia passava.
2. In physiology, the ability of an organism or body part to respond to a stimulus
The irritability of nerve tissues allows them to transmit signals.
A irritabilidade dos tecidos nervosos permite que transmitam sinais.
3. A state of being easily provoked to anger or impatience
Lack of sleep contributed to her irritability.
A falta de sono contribuiu para sua irritabilidade.