The delineation of electoral constituencies for reasons of political advantage is termed

The term for the practice of dividing electoral districts in a way that gives an unfair advantage to a particular political party or group is called gerrymandering. This means that electoral boundaries are drawn in a way that makes it easier for one party to win more seats, even if they do not have more overall support from the voters. This can be done by grouping certain communities together, or by splitting up areas where certain groups tend to vote in a certain way. Gerrymandering is often considered a controversial practice, as it can undermine the democratic process and prevent fair representation of all citizens. The term delimitation is also related to the drawing of electoral boundaries, but it refers to the process of determining the geographic boundaries of electoral districts, without the implication of political manipulation.