import re


def get_definition_list(pos_list):
    """Parse definitions from pos_content.

    Returns:
        definition_list (list): [(pos, definition-content), ...]

    """
    definition_list = []
    for pos, pos_content in pos_list:
        for definition_content in re.split(r" \d\. ", pos_content):
            definition_list.append((pos, definition_content))
    return definition_list