how can we learn English word meanings very fast?

Don't stop at the listening portion, and when you study, don't just listen. Speak out loud the material you are listening to and practice what you hear. Practice speaking out loud until your mouth and brain can do it without any effort. By doing so, you will be able to speak English fluently.

you can use translate app from play store or dictionary to find meanings by smart phone. read news papers along with dictionary. that'll help you.