pick up on something phrasal verb (see also pick)

1. to notice something about the way someone is behaving or feeling, even though they are trying not to show it:
Children pick up on our worries and anxieties.

2. to return to a point or an idea that has been mentioned and discuss it more:
I’d like to pick up on a point that Steven made earlier.

3. pick somebody up on something to criticize someone slightly for something they have said:
I knew he was lying and I should have picked him up on it.

[TahlilGaran] Dictionary of Contemporary English ▲

pick up on
pick up on (something)
1.
to continue talking about something previously said.
Just to pick up on what Haley asked, I think the president clearly did get the message.

2.
to notice something.
The evidence was there - I just didn't pick up on it.

[TahlilGaran] English Idioms Dictionary ▲

pick up on something
pick up on (something)
1.
to continue talking about something previously said.
Just to pick up on what Haley asked, I think the president clearly did get the message.

2.
to notice something.
The evidence was there - I just didn't pick up on it.

[TahlilGaran] English Idioms Dictionary ▲