A landslide victory is an election result in which the winning candidate or party achieves a decisive victory by an overwhelming margin, securing a very large majority of votes or seats far beyond the typical competitive outcome. The term became popular in the 1800s to describe a victory in which the opposition is "buried", similar to the way in which a geological landslide buries whatever is in its path. A landslide victory for one party is often accompanied by an electoral wipeout for the opposition, as the overwhelming support for the winning side inflicts a decisive loss on its rivals. What qualifies as a landslide victory can vary depending on the type of electoral system, as the term does not entail a precise, technical, or universally agreed-upon measurement. Instead, it is used informally in everyday language, making it subject to interpretation. Even within a single electoral system, there is no consensus on the exact margin that constitutes a landslide victory.
A landslide victory implies a powerful expression of popular will and a ringing endorsement by the electorate for the winner’s political platform. A landslide can be viewed by a winning candidate or party as a mandate or a tacit authorization from the public to implement their proposed policies and pursue their agenda with confidence. Emboldened by the result, the winner may undertake ambitious reforms or significant policy shifts to reflect the electorate’s desire for meaningful change. However, it can also indicate deep political polarization in an electorate or an unfair election.