The term 'Big Chill' can be broken down into three crossword solutions: AGUE (4 letters), THE (3 letters), and ICEAGE (6 letters). AGUE is a noun meaning a fever or shivering fit, usually caused by malaria. THE is a definite article used to refer to a specific person, place, thing, or idea already mentioned or known about. ICEAGE is a noun referring to a period of time in Earth's history when glaciers covered much of the planet. Together, these three words form the phrase 'Big Chill, ' which is often used to describe a period of intense cold.