| 1. | a person who supports or sympathizes with a political party, esp. the Communist party, but is not an enrolled member. |
| 2. | anyone who, although not a member, supports or sympathizes with some organization, movement, or the like. |
[fel-oh-trav-uh-ling, -trav-ling] 
, adjective | fellow traveler n. One who sympathizes with or supports the tenets and program of an organized group, such as the Communist Party, without being a member. |
One who supports the aims or philosophies of a political group without joining it. A “fellow traveler” is usually one who sympathizes with communist doctrines but is not a member of the Communist party. The term was used disparagingly in the 1950s to describe people accused of being communists.