Meaning of the word "border on" in English

What does "border on" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

border on

US /ˈbɔːrdər ɑːn/
UK /ˈbɔːrdər ɒn/

Phrasal Verb

to be very close to or similar to something, often something undesirable

Example:
His behavior began to border on rudeness.
The situation was so absurd it began to border on comedy.