decreasing
v. B1 Intermediate US //ˈdiˌkɹisɪŋ// UK //dˈiːkɹiːsɪŋ// de·creas·ing
v. becoming smaller in size, amount, or number. You use this when something is going down over time.
v. becoming smaller or fewer in size, amount, intensity, or degree. The present participle form of 'decrease', often used to describe a downward trend.
The number of students in the class is decreasing.
The company is decreasing its spending on advertising this year to save money.
By decreasing the temperature of the solution gradually, the researchers were able to observe the formation of crystals without the interference of rapid chemical changes.
From decrease + -ing (participial suffix).
Usage
The verb can be used transitively (decreasing something) or intransitively (something is decreasing).