Set drupal taxonomy terms in the civicrm custom option fields
You should describe more these 3 columns as it's not clear what type they are and how you need to use them, but I would create them as either options on a custom field or as tags

tags have 2 "usable" columns (the name and a description), optionvalues have 4 (label, value, name, description)

you can import them from the command line using the api or use an extension.