To communicate with a base etc, by telephone.(verb)
To summon someone, especially for help or advice.(verb)
To withdraw something from sale or circulation.(verb)
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Use "call in" in a sentence
"It prefers that its ships call in to Bengal before proceeding to Wampoa, why I do not know."
"“He had not had time to call in the assistance of a Parisian hatter and tailor,” writes M. de Molinari, “and with his long hair, his tiny hat, his ample frockcoat and his family umbrella, you would have been apt to mistake him for an honest peasant who came to town for the first time to see the metropolis.”"
"He wondered if there was another solution, if there was someone who could spend nights with her and call in to check on her throughout the day, and he thought that he would ask Nancy Brophy when he next came down."