A synthesis reaction or direct combination reaction is one of the most common types of chemical reactions. In a synthesis reaction two or more chemical species combine to form a more complex product.
A design review is a milestone within a product development process whereby a design is evaluated against its requirements in order to verify the outcomes of previous activities and identify issues before committing to-and if need to be re-prioritise-further work.
Definition of design for English Language Learners : the way something has been made : the way the parts of something (such as a building, machine, book, etc.) are formed and arranged for a particular use, effect, etc.