"Multicellular" refers to organisms that are made up of more than one cell. These cells work together to perform various functions necessary for the organism's survival. Examples of multicellular organisms include humans, plants, and animals. Each cell in a multicellular organism can have specialized roles, allowing for greater complexity and efficiency. In contrast to unicellular organisms, which consist of a single cell, multicellular organisms can grow larger and develop specialized tissues and organs. This organization enables them to carry out more complex processes, such as digestion, respiration, and reproduction, contributing to their adaptability in different environments.