not legally or officially acceptable（法律上或官方）不承认的；无效的◆The contract was invalid because parts were added after it was signed.由于合同签署后又添加了内容，因此这一合同无效。 () of a type that a computer cannot recognize不能识别的；无效的◆The URL is invalid.这网址无效。not based on all the facts and therefore not correct无充分事实的；站不住脚的◆an invalid argument站不住脚的论点OPPvalid ▸invalidity /ˌɪnvəˈlɪdəti/