The term O, E.G. is an abbreviation for 'Example Given', which is often used in writing to provide an example of a concept or idea. The crossword solutions for this term are MAG (3 letters), ALER (4 letters), and OVAL (4 letters). MAG stands for 'MAGAZINE', which is a periodical publication containing articles, stories, pictures, or other features. ALER stands for 'ALERT', which is a warning or notification of something important. Finally, OVAL stands for 'OVAL', which is a shape that is round like a circle but has two longer sides.