B1
a noun that does not have a plural form and cannot be used with "a" or "one"
Dictionary examples:
'Money' is an uncountable noun, but my empty wallet disagrees! (0.0)
'Time' is an uncountable noun, but I still count the minutes until lunch! (0.0)
I thought 'homework' was an uncountable noun until my teacher gave me ten assignments! (0.0)
"Information" and "furniture" are uncountable nouns. (50.1)