It is not really a dictionary, of course, in the sense that is lacks definitions; it is merely a word list.
( ( ( ( It ( ( ( ( ( is not ) really ) ( ( ( a dictionary ) , ) ( of course ) ) ) , ) ( in ( ( the sense ) ( that ( is ( lacks definitions ) ) ) ) ) ) ) ; ) ( it ( ( is merely ) ( a ( word list ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBZ is) (RB not) (ADVP (RB really)) (NP (NP (DT a) (NN dictionary)) (, ,) (PP (IN of) (NP (NN course)))) (, ,) (PP (IN in) (NP (NP (DT the) (NN sense)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (VP (VBZ lacks) (NP (NNS definitions)))))))))) (: ;) (S (NP (PRP it)) (VP (VBZ is) (ADVP (RB merely)) (NP (DT a) (NN word) (NN list)))) (. .)))
This is definitely a dictionary since it is filled with definitions.
( This ( ( ( ( is definitely ) ( a dictionary ) ) ( since ( it ( is ( filled ( with definitions ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ is) (ADVP (RB definitely)) (NP (DT a) (NN dictionary)) (SBAR (IN since) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN filled) (PP (IN with) (NP (NNS definitions)))))))) (. .)))