catch up - Wiktionary catch up (third-person singular simple present catches up, present participle catching up, simple past and past participle caught up). (transitive) To pick up ...
Catching up | Define Catching up at Dictionary.com to catch a criminal; to catch a runaway horse. 2. to trap or ensnare: to catch a fish. 3. to intercept and seize; take and hold (something thrown, falling, etc.):.