weigh somebody/something ↔ up phrasal verb (see also weigh)

1. to consider something carefully so that you can make a decision about it:
We’re still weighing up the pros and cons (=the advantages and disadvantages) of the two options.

2. to watch someone and listen to them carefully so that you can form an opinion about what they are like:
I could see that he was weighing me up.

[TahlilGaran] Dictionary of Contemporary English ▲