The term 'turn on' can be defined as to ACTIVATE or energize. The crossword solutions for this term are DEPEND (6 letters), SEND (4 letters), ADIME (5 letters), HOPUP (5 letters), START (5 letters), AROUSE (6 letters), ENTICE (6 letters), ACTUATE (7 letters), and ACTIVATE (8 letters). Each of these words can be used to describe the act of turning something on, whether it be a machine, an emotion, or an idea. DEPEND implies reliance on something, while SEND suggests sending a signal or message. ADIME, HOPUP, and START all suggest beginning or initiating something. AROUSE, ENTICE, ACTUATE, and ACTIVATE all imply energizing or stimulating something. All of these words can be used to describe the act of turning something on.