Définitions
1.VerbTo match the pace (of another person or a beat).
2.VerbTo change so as to function harmoniously with; fit in.
3.VerbTo adjust to advances in circumstances or criteria; catch up.
4.NounA step in which one foot meets the other foot without passing it and the weight shifts to the foot that just moved.
5.NounA pause in order to assimilate new information.