/ ˈsiːzənl; NAmE / adjective
1.
happening or needed during a particular season; varying with the seasons :
seasonal workers brought in to cope with the Christmas period
seasonal variations in unemployment figures
2.
typical of or suitable for the time of year, especially Christmas :
seasonal decorations
OPP unseasonal
► sea·son·al·ly / -nəli; NAmE / adverb :
seasonally adjusted unemployment figures (= not including the changes that always happen in different seasons)