My word of the day is mindset. The American Heritage Dictionary defines this as "a fixed mental attitude or disposition that predetermines a person's responses to and interpretations of situations." Mindset is different from mood, because it changes less. We use it to talk about a person's general attitude, his or her way of thinking or way of seeing things. You will often see this word with an adjective describing the attitude, for example "environmental mindset," which means that the person or entity is in the habit of thinking about the environment.