继母 (jìmǔ) literally means 'successive mother' — the character 继 (jì) conveys 'to succeed, follow, or take over', while 母 (mǔ) means 'mother'. Together, they refer to a woman who marries one’s father after the biological mother has died or divorced him, thereby becoming the child’s stepmother. Unlike the neutral term 养母 (yǎngmǔ, 'adoptive mother'), 继母 specifically implies a marital relationship with the biological parent and carries no legal adoption requirement.

This word is commonly used in family narratives, legal contexts, literature, and everyday conversation when describing blended families. It may carry subtle emotional connotations depending on context — sometimes neutral, sometimes implying distance or complexity — though the term itself is formally respectful and not inherently negative. It contrasts with 生母 (shēngmǔ, 'biological mother') and 亲生母亲 (qīnshēng mǔqīn, 'birth mother'), highlighting the distinction between biological and marital kinship ties.