0 present participle of concentrate
1 to direct your attention or your efforts towards a particular activity, subject, or problem:
2 to bring or come together in a large number or amount in one particular area:
3 to make a liquid or substance stronger and reduce its size by removing water from it
I couldn't concentrate on my work - my mind was on other things.
She was concentrating on her book and his voice startled her.
I can't concentrate because of all the noise the builders are making.
It's a good film, but the plot is very complicated and you really have to concentrate.
Moreover, given limited administrative resources, it is likely that rate collectors maximise yields by concentrating on the most accessible and better-off ratepayers.
Concentrating on indefinites, he reviews recent proposals that indefinites are not quantificational but introduce a choice-function instead.
Voters have an interest in concentrating their votes on parties that can gain representation.