[{"Bold_text": "verb (used without object)", "List Items": ["to go aboard a train ."]}, {"Bold_text": "verb (used with object)", "List Items": ["to put aboard a train ."]}, {"Bold_text": "verb (used with object)", "List Items": ["Chemistry.(of a substance, as a vapor) to carry along (a dissimilar substance, as drops of liquid) during a given process, as evaporation or distillation.", "(of a liquid) to trap (bubbles).", "Meteorology.to transfer (air) into an organized air current from the surrounding atmosphere ( detrain )."]}]