Definition of seasonality in US English:

seasonality

noun

  • See seasonal

    • ‘So in a rush of seasonality today I have made spinach and lentil soup.’
    • ‘The plant looks good in pots or borders, the only defect being its seasonality.’
    • ‘One regrettable aspect of modern living is the loss of seasonality.’
    • ‘For many animals seasonality is common, as shown in winter hibernation, and olfaction plays an important role.’
    • ‘He is hoping to expand on research completed for his PhD, which focussed on seasonality and its impacts on people's moods.’

Pronunciation

seasonality

/ˌsēzəˈnalitē/