1. catch step - Noun
2. catch step - Verb
To match the pace (of another person or a beat).
(metaphoric) To change so as to function harmoniously with; fit in.
(metaphoric) To adjust to advances in circumstances or criteria; catch up.
A step in which one foot meets the other foot without passing it and the weight shifts to the foot that just moved.
A pause in order to assimilate new information.
Source: en.wiktionary.org