txtDefinition=In music, the {\uldb interval}{\v 84848} three steps apart. Thirds come in two common sizes ({\uldb minor}{\v 88035}, consisting of three {\uldb half-steps}{\v 83959}; and {\uldb major}{\v 86320}, consisting of four half-steps) that traditionally determined the type of {\uldb triad}{\v 102827}.