One who shows the way by leading, directing, or advising. One who serves as a model for others, as in a course of conduct. A person employed to conduct others, as through a museum, and give information about points of interest encountered. Something, such as a pamphlet, that offers basic information or instruction: a shopper's guide. A guidebook. Something that serves to direct or indicate. A device, such as a ruler, tab, or bar, that serves as an indicator or acts to regulate a motion or operation. A soldier stationed at the right or left of a column of marchers to control alignment, show direction, or mark the point of pivot. To serve as a guide for; conduct. To direct the course of; steer: guide a ship through a channel. To exert control or influence over. To supervise the training or education of. To serve as a guide.