Reacting is an action that involves RESPONDING to a stimulus or situation. It is often used in psychology to refer to the way people respond to certain stimuli or situations. In terms of crossword solutions, reacting can refer to RESPONDING to a particular situation or event. For example, if someone is faced with a difficult situation, they may react in a certain way, such as by becoming angry or scared. Reacting can also refer to RESPONDING to a particular stimulus, such as a sound or smell. In this case, the person may react by becoming startled or curious. Reacting can also refer to RESPONDING to a particular emotion, such as fear or joy. In this case, the person may react by becoming excited or sad.