You may hear some people claim that they have a "high tolerance" and can handle more alcohol than others. There are two distinct things to consider in order to understand what tolerance IS and what it IS NOT.
Many Factors Impact Our Bodies Ability to Absorb and Metabolize Alcohol
These include weight, hormone levels, body composition, enzyme levels, etc. Other factors can include how much a person has eaten, in what time period, and how hydrated they are. All of these differences can make two people who have had the exact same amount of alcohol in the exact same period of time have very different Blood Alcohol Concentrations (BAC). Sometimes when people say they can handle more alcohol than others, this is what they mean. If this is what they are describing as "tolerance" then this simply means that their body is processing alcohol at a different rate than others due to physiological differences and the dosage and corresponding effect of alcohol should be consistent over time for them. However, "tolerance" is actually something quite different.
If you or someone you know finds that it takes more and more alcohol to FEEL intoxicated, it is important that you seek further education and resources and know if this is a time to get help.