a person who shows the way to others, especially one employed to show tourists around places of interest

a tour guide

a person who advises others, especially in matters of behaviour or belief

his spiritual guide

a structure or marking which directs the motion or positioning of something

the guides for the bolt needed straightening

a girl or young woman who is a member of Girlguiding (formerly the Guide Association) or a similar organization

show or indicate the way to (someone)

he guided her to the front row and sat beside her

information is available to guide you through the planning and development process

direct or influence the behaviour or development of

his life was guided by his religious beliefs