-var-file

• terraform plan -var-file="your_file.tfvars"
• terraform apply -var-file="your_file.tfvars"

Related

• Terraform variables: Error: Reference to undeclared input variable
• -var
• variables.tf

See also

• terraform plan: [ -refresh-only | -lock=false | -target | -var-file | will be created | --help], Terraform plan errors, Terraform plan examples, Terraform plan execution errors, (known after apply)