lain / lane are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
lain: (verb) be located or situated somewhere; occupy a certain position. (verb) be lying, be prostrate; be in a horizontal position. (verb) be and remain in a particular state or condition. (verb) tell an untruth; pretend with intent to deceive. (verb) have a place in relation to something else.
lane: (noun) a narrow way or road. (noun) a well-defined track or path; for e.g. swimmers or lines of traffic.
lain: l·EY·n
lane: l·EY·n
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)