The term 'not at home' can be expressed in three different ways using crossword solutions. The first is 'AWAY', which has four letters and implies that someone is not in the same place as they usually are. The second is 'OUT', which has three letters and suggests that someone is not inside a particular area or location. The third is 'GONE', which also has four letters and implies that someone is no longer present in a certain place. All three of these words indicate that someone is not in their usual place of residence.