(îò ôðàíö. pionnier - ïåðâîïðîõîäåö - çà÷èíàòåëü), 1) ÷åëîâåê,ïåðâûì ïðîíèêøèé â íåèññëåäîâàííóþ îáëàñòü, ïðîêëàäûâàþùèé íîâûå ïóòè âêàêîé-ëèáî ñôåðå äåÿòåëüíîñòè. 2) ×ëåí äåòñêèõ ïèîíåðñêèõ îðãàíèçàöèé.
