(1) The patient may be afraid that their partner will think that it is catching .(2) The disease is catching and will spread to other trees.(3) Billy's zest for life and sense of fun is catching .(4) It brings to mind a contagious catching ailment.(5) I am sure you have been in a situation when someone laughed, and it just seemed as though the laughter was catching .
📺 Word Example from TV Shows

Hank CATCHING Gus
equals Hank CATCHING us.
Breaking Bad Season 4, Episode 8

- Pretty much, why?
- Just CATCHING up.
The Big Bang Theory Season 1, Episode 15

No, I don't see that CATCHING on at all.
The Big Bang Theory Season 4, Episode 22

Hank CATCHING Gus
equals Hank CATCHING us.
Breaking Bad Season 4, Episode 8

I'm CATCHING
her in the act.
The Big Bang Theory Season 7, Episode 2