Tell me
The formal version of 'tell me'. Use it with people you don't know, elders, or in professional settings to show respect.
Means 'tell me' in the sense of telling a story or sharing details. Use when you want to hear more about a topic.
Means 'let me know' or 'inform me'. Use when asking for information about a future event or decision.
Tell me the truth, please.
Miss, tell me how to get to the bus station.
You went to the party? Tell me everything!
Let me know when you get home.
It's very common to hear 'decime' (deh-SEE-meh). This is because they use 'vos' instead of 'tú' for informal address, which changes the command form.
In addition to its standard use, 'dígame' is a very common and polite way to answer the telephone, similar to saying 'Hello?'
While 'dime' (informal singular) and 'dígame' (formal singular) are used just like in Latin America, the informal plural command is 'decidme' (deh-THEED-meh), used with 'vosotros'.
Saying 'Decir me' instead of 'dime'. — In Spanish, when you give a positive command, the pronoun (like 'me') attaches directly to the end of the verb. So 'decir' + 'me' becomes 'dime'.
Using 'dime' with a stranger or an authority figure. — This can sound too familiar or even rude. Always use the formal 'dígame' to show respect unless someone invites you to speak informally ('tutear').
Confusing 'dime' (tell me) with 'dame' (give me). — 'Dime' comes from the verb 'decir' (to say/tell). 'Dame' comes from 'dar' (to give). They sound similar but have completely different meanings. 'Dame el libro' (Give me the book) vs. 'Dime la hora' (Tell me the time).