What is the meaning of Crawler?

A child who is able to creep using its hands and knees but is not able to walk.

A crawl swimmer.

A tractor crawler, a motorized vehicle that uses caterpillar tracks instead of wheels.

A software bot that autonomously follows connected paths such as links between web pages.

A mobile stage in the development of stationary hemipteran insects such as scale insects—generally the first instar.

A person who is abused, physically or verbally, and returns to the abuser a supplicant.

A sycophant.

to swim using the crawl stroke

to spider

Source: wiktionary.org