It essentially means to take the place of something or someone else, often by force or by being superior.
Here are some examples of how "supplantar" can be used in a sentence:
* "La nueva tecnología ha supplantado a los métodos tradicionales." (The new technology has supplanted traditional methods.)
* "El nuevo rey supplantó al antiguo rey." (The new king supplanted the old king.)
* "El amor de su madre supplantaba la necesidad de un padre." (Her mother's love supplanted the need for a father.)
"Supplantar" is a powerful word that can be used in a variety of contexts to describe the act of replacing something or someone.