The term 'Piece of Mind' is a phrase used to describe a state of being in which one feels at ease and free from worry. It can be achieved through various means, such as meditation, relaxation, or simply taking a break from the stresses of life. The crossword solutions for this term are OPED (4 letters), IDEA (4 letters), NOTION (6 letters), and BRAINCELL (9 letters). OPED stands for opinion-editorial, which is an article written by a journalist expressing their opinion on a particular topic. IDEA is an acronym for 'Intellectual Development and Education Activity', which is a program designed to help children develop their intellectual abilities. NOTION is a concept or IDEA, while BRAINCELL is a metaphor for a person's thought process. All of these words can be used to describe the concept of having a 'Piece of Mind'.