It means i'm not gonna grow taller after 18 but i'm a late bloomer my little brother and me was nearly the same height when I was 12,13 year's that time I was just a inch taller then him and i'm a left handed guy also so i've a lot things to confirm that i'm a late bloomer. I reaches puberty when I was 14 cause that time was the time when I was so taller then him. So I think i'm still in puberty i'm 17 and three years in puberty is common. Humans can even stay in puberty 4 years. So please sir this time i'm asking last time will I be taller then my 5, 11 inches taller dad! my younger brother is already taller then him he's 6 feet 1.he was a average bloomer. Thank you sir I hope you'll answer my questions soon. Have a nice day.