›the act of using something new or different instead of something else, or the new thing that is used: the substitution of sth (for sth)The government plans to encourage the substitution of cheap generic drugs for expensive brand-name ones.Telecommuting is not a substitution for child care.
In a study published recently and widely reported in the media, researchers from Harvard University School of Public Health found that people who drink a moderate amount of coffee per day are less likely to die from a range of diseases. Good news for coffee drinkers, who make up an ever-increasing proportion
choosing to eat a diet that has minimal impact on the climate, i.e. one that excludes food transported a long way or meat whose production gives rise to CO2 emissions Climate change is not normally on people’s minds when they choose what to have for lunch, but a new diet is calling for