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to be caught; to be arrested
to hold on to; to grasp
to find (e.g. proof); to get (e.g. a taxi)
to be detained by
泥棒が警察に捉まるのは時間の問題だ。
It's only a matter of time before the thief gets caught by the police.
嵐の中で木の枝に捉まって耐えた。
I held onto a tree branch and endured the storm.
タクシーが捉まらなくて困ったことがある。
There have been times when I couldn't catch a taxi.