This document discusses definitions and theories of globalization. It begins by examining definitions of globalization from various scholars, seeing it as the shrinking of distances, the onset of a borderless world, or the increasing flows of people, information, and objects. It then discusses metaphors used to describe globalization, such as seeing the world as solid or liquid. Next, it outlines several theories of globalization, such as whether it leads to cultural homogeneity or heterogeneity. It also contrasts theories of cultural imperialism versus glocalization. Finally, it examines the dynamics of global and local culture, including differentialism, hybridization, and convergence.