thickening
n. B2 Upper Intermediate US //ˈθɪkənɪŋ// UK //θˈɪkənɪŋ// thick·en·ing
n. the process of becoming thicker or the state of being thick. You use this to describe things like soup, paint, or even a person's voice.
n. the process of becoming denser or more viscous; the state of having a higher density or consistency than a standard reference.
The soup needs some more salt before the thickening is complete.
The thickening of the atmosphere during the storm made it difficult for the pilots to see the runway.
The gradual thickening of the patient's blood was a clear sign that the medication was beginning to take effect, though the doctor remained cautious about the side effects.
From thicken + -ing.