音标：[in'vælid]
n. 病人, 残废者
a. 有病的, 无效的
【医】 病废者, 久病衰弱者, 病废的
【经】 无效的
在线英汉词典

invalid的短语、例句：

invalid adj 1 not properly based or able to be upheld by reasoning 无适当根据的; 无道理的; 站不住脚的
an invalid argument, assumption, claim, etc 站不住脚的论据、 没有根据的假定、 没有道理的要求. 2 not usable; not officially acceptable (because of an incorrect detail or details); not legally recognized 无用的; 不能正式接受的; 法律上不承认的; 无效的
A passport that is out of date is invalid. 护照过期是无效的.
an invalid will 无效的遗嘱
declare a marriage invalid 宣布一婚姻在法律上无效. invalid n person weakened through illness or injury; one who suffers from ill health for a very long time 病弱者; 伤残者; 久病者
He has been an invalid all his life. 他终身残废.
[attrib 作定语] her invalid mother, father, etc 她那长期抱病的母亲、 父亲等
an invalid diet, ie one planned for an invalid 伤病残者的规定饮食
an invalid chair, ie one with wheels on for moving an invalid easily 轮椅. invalid, v 1 (idm 习语) invalid sb `home send sb (esp a soldier) home (esp from abroad) because of ill health （因健康恶劣）遣送某人（尤指士兵）回家（尤指回国）. 2 (phr v) invalid sb out (of sth) cause sb to leave (esp the armed forces) because of ill health （因健康恶劣）使某人离去, （尤指）退役
He was invalided out of the army because of the wounds he received. 他因负伤而退役.