I've been in some spicy meetings where people pull up definitions on their phone. Those were amazing.

Haha, do you remember what the word was?

One was trying to decide whether to call the first version of something. Revision 0, revision 1, or version 1 followed by revision 1. The users that we were making the application for didn't care one bit what we called it, but the programmers sure had a lively discussion with a lot of eye rolling in the room.

To paraphrase Samuel Johnson, dictionary definitions are the last resort of someone flailing for an argument.

Not if the argument is essentially about dictionary definitions. FWIW, if I had to imagine someone saying something is amazing without any context my understanding would tend towards the “old” meaning.