to make sb/sth less strong or powerful; to become less strong or powerful 使…弱；削弱；使…衰减◆The recession has weakened demand for luxury goods. 经济衰退削弱了奢侈品需求。
to make a currency, market etc. move towards a lower level; to fall 使（货币、市场等）疲软◆If the yen weakens it will help Japan's export sector. 日元走软将有助於日本的出口部门。