Hello, I'm an 8th grader, second year in canada from korea, and there is this thing that's been bothering me since last year. When I look up in wikipedia and such other sources, they say that a transitive verb is a verb that requires both a direct subject and one or more objects. Does that mean a sentense with a transitive verb will not make sense if it didn't have a subject and an object?
"Harry sees Adam." is one of the examples given in wikipedia, and why can't "Harry sees." be a complete sentense? I'm sure there is something catastrophically wrong with the way I'm thinking, and I would like very much to end it ASAP.

I mean, it's not like I'm going to run into this in an english class anytime soon(I don't think), but this first came up last year when I was searching up words on dictionary.com, and kept doing so a several different times ever since. Can anyone please help?