Definitions
1.VerbTo mind one's own business.
2.VerbIn a way whereby one avoids dilettantism: avoiding giving an opinion in domains where one's skills and knowledge are not at an expert level.
3.VerbIn a way whereby one avoids interfering in others' interests, regardless of skill level.
4.VerbTo keep to one's own kind; to avoid intermixing or associating with other types of people.
5.VerbUsed other than figuratively or idiomatically: see stay, in, one's, lane; for example, either manually or via lanekeeping by software.