The word "zoom" refers to a verb that means to make a continuous low humming or buzzing sound, or to move or travel very quickly. In the context of the given clue, "slogan of 1-Down," it suggests that "zoom" is being used as a repeated phrase that serves as a slogan for another word or phrase. However, without further information about "1-Down" or the specific context, it is unclear what the repeated slogan specifically refers to.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Popular videoconferencing app. Explanations are generated by AI and may be inaccurate.