rookie /ˈɹʊki/noun 4verb 2adjective 1forms 5 noun4 •An inexperienced recruit, especially in the police or armed forces. •A novice. •An athlete either new to the sport or to a team or in his/her first year of professional competition, especially said of baseball, basketball, hockey and American football players. •(UK) A type of firecracker, used by farmers to scare rooks. verb2 •To be a rookie; to go through one's inexperienced learning period in a job, team, or organization.In 1977 he rookied as a smokejumper with the International Forest Fire Systems, a private firm that contracted smokejumping services to Canada's Northwest Territories. — 2002 •To haze one or more rookies as an initiation ritual.Great was my surprise when I found that I had been "rookied" in for a policing-up detail with no chance to "allez." — 1919 adjective1 •Non-professional; amateurThe game was going well until I made that rookie mistake.the rookiest of rookie mistakes formsrookied · rookying · rookies · rookier · rookiest