Definition from Wiktionary, the free dictionary
lapse (plural lapses)
- A temporary failure; a slip.
- A decline or fall in standards.
- A pause in continuity.
- An interval of time between events.
- A termination of a right etc, through disuse or neglect.
- (weather) A marked decrease in air temperature with increasing altitude because the ground is warmer than the surrounding air. This condition usually occurs when skies are clear and between 1100 and 1600 hours, local time. Strong convection currents exist during lapse conditions. For chemical operations, the state is defined as unstable. This condition is normally considered the most unfavorable for the release of chemical agents. See lapse rate.
- (law) A common-law rule that if the person to whom property is willed were to die before the testator, then the gift would be ineffective.
- (a temporary failure, slip): blooper, blunder, boo-boo, defect, error, fault, faux pas, fluff, gaffe, mistake, slip, stumble, thinko
Derived terms 
(common law rule):
Related terms 
a temporary failure; a slip
a termination of a right, etc, through disuse or neglect.
- (intransitive) To fall away gradually; to subside
- (intransitive) To fall into error or heresy
- To slip into a bad habit that one is trying to avoid.
- (intransitive) To become void
- plural indefinite of laps
- vocative masculine singular of lāpsus