1. An innate, stereotyped pattern of behavior that is relatively unchanging and occurs in response to specific stimuli, commonly studied in ethology
The fixed behavior of a spider building its web is an excellent example of instinctive action.
O comportamento fixo de uma aranha construindo sua teia é um excelente exemplo de ação instintiva.
2. A rigid or inflexible pattern of behavior that does not adapt to changing circumstances
His fixed behavior made it difficult for him to adjust to new work environments.
Seu comportamento fixo dificultou sua adaptação a novos ambientes de trabalho.