if your attention fastens on someone or something, you start to pay close attention to them
if your eyes fasten on someone or something, you start to look at them very carefully or for a long time
to accept and start to use an idea or suggestion very quickly and with enthusiasm
to keep following or talking to someone and not let them go
His gaze was fastened on his daughter.
I fastened my attention on the noise in the distance.
It was a brilliant idea, and I fastened on it immediately.
My mind fastened on this new and terrible thing that was happening.
Seven pairs of eyes fastened on him at this news.
fasten on
fastens on
fastening on
fastened on
There is no origin for this phrasal verb
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