The phrase "a definite decrease in" is correct and usable in written English.
It can be used when discussing a clear or noticeable reduction in a particular quantity or quality.
Example: "The study showed a definite decrease in the number of participants over the last five years."
Alternatives: "a clear reduction in" or "a significant drop in".
Samuel Spencer Blum, a real estate lawyer here, said he has seen "a definite decrease" in new contracts.
Emma de Souza, from the Society of London Theatre, which analyses attendance figures, says vaguely: "There was a definite decrease in people attending.
Mary Howe, of the Homeless Youth Alliance, says claims of increasing crime and disorder are false: "I feel like I have seen a decrease in crime and a definite decrease in hard drug use in the last couple of years".
This understanding is often based on the pressure area plot published by Sanderson (1988), which combines a large number of data sources and ice interaction situations on a single plot and shows a definite decrease in pressure with increasing area.
However, the modulus ratio obtained from the relations involving the joint factor, Jf, indicate a definite decrease in the modulus ratio with a decrease in the quality of the rock mass.
The resulting analyses carried out using reliability analysis methods such as first order second moment reliability method and Monte Carlo simulations show a definite decrease in the foundation's performance and a concurrent increase in its probability of failure within the structure's design life.
The ET value showed a definite decrease from 29.7±23.4 to 14.9±11.2 pg/ml.
The residue in the last panel of the figure shows that there is a definite decreasing trend in the green line emission rate.
A slight but definite decrease in [6-C]glucose-derived CO2 production indicated that astroglial mitochondrial oxidative phosphorylation in the tricarboxylic acid cycle was suppressed, whereas glucose utilization increased, as assessed by the rates of [C]deoxyglucose phosphorylation.
However, no definite decrease in the expression of ADAMTS1, ADAMTS15 and TIMP3 was obtained by the treatment.
Tertiary obesity clinics on the other hand report improvements in body mass index z score in most children, with a third achieving reductions associated with definite decreases in fat and risk factors for heart disease and diabetes.
