a small mistake, especially one that is caused by forgetting sth or by being careless 小错；（尤指）记错，过失，疏忽◆The bank admitted there had been a serious lapse in security. 这家银行承认安全方面存在严重的疏忽。◆The mistake was caused by a lapse of judgement. 错误是由判断失误造成的。
a period of time between two things that happen （两件事发生的）间隔时间◆a time lapse of 30 minutes 30 分钟的间隔时间