Definition: Technically a type of spear, only larger in length and width, therefore unsi=uitable for throwing or rapid thrusting since it is heavier than a regular spear.
“Adapated for mounted combat, lances did not have spear tips that broke off or bent, unlike many throwing weapons of the spear/javelin family.”
Source: https://www.swordsknivesanddaggers.com/medieval-weapons-glossary/