C'est ce que j'ai dit, que je t'aime, mon amour means 'that's what I said, that I love you, my Love' in English.
"ils ont dit" means "they have said".
DIT means "Details In Thread"
Yes, 'a dit' means 'said'. The auxiliary 'a' means '[he/she/it] has'. The past participle 'dit' means 'said'. Together, they're pronounced ah dee'.
'Comment dit-on ...' means "how do we say ..." in English.
Dit means 'says' in English. C'est ce qu'elle dit > that's what she says.
"J'ai dit" in French translates to "I said" in English.
It means: How it is to our advantage or how we will use it.
Un ami vous a dit means "a friend told you ..."
Bien dit in French means "well said" in English.
"Dit" is the conjugated from the french verb Dire, which means to say, in the third person. For example, if one wants to say "he says" or "she says" then one would write <<il dit>> or <<elle dit.>>
"on vous l'a dit" means "you have been told" or "we told you".
qu'est-ce que tu as dit ? means "what did you say?" in French.