1. The development and differentiation of the structures and forms of an organism; specifically, the changes that occur in the cells and tissue during embryonic development.
2. The morphological transformations including growth, alterations of germinal layers, and differentiation of cells and tissues during development.
3. The set of procedures by which individual cells or cell populations undergo changes in shape or position incident to organismic development.
4. The emergence of shape in cells, tissues, or the entire embryo.