A giant is read as someone or something that makes you feel small, as a child among adults does. Dream books also see it as your own outsized potential or a problem that has taken on exaggerated size.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.