Is the word estranho the same in Brazilian and European Portuguese?

No

Explanation While the fundamental definition of "estranho" (strange, unusual, or unfamiliar) remains identical in both dialects, the answer is No because there are differences in typical usage, grammatical context, and pronunciation:

• Typical Usage: In Brazil, "estranho" is the primary word used to describe someone or something that is "weird," "creepy," or "odd." In Portugal, while "estranho" is used, the word "esquisito" is much more frequently used to convey that specific "weird/creepy" connotation, whereas "estranho" is often reserved for things that are simply "unfamiliar" or "unusual."
• Grammar: The sentence structures surrounding the word change significantly due to different pronoun usage (você in Brazil vs. tu in Portugal) and different verb conjugations.
• Pronunciation: Brazilian Portuguese features more open, melodic vowels. Continental Portuguese features "reduced" or "closed" vowels, where unstressed vowels (like the "e" in estranho) can become nearly silent or much shorter.

Brazilian Portuguese Examples

1. "Aquele cara é muito estranho." (That guy is very weird.)
2. "Senti um cheiro estranho na cozinha." (I smelled a strange smell in the kitchen.)
3. "É estranho você não ter vindo." (It's strange you didn't come.)
4. "O tempo está meio estranho hoje." (The weather is a bit weird today.)
5. "Achei esse lugar muito estranho." (I found this place very strange.)

Portuguese (Portugal) Examples

1. "Aquele homem é muito esquisito." (That man is very weird.)
2. "Senti um cheiro estranho na cozinha." (I smelled a strange smell in the kitchen.)
3. "É estranho não teres vindo." (It's strange you didn't come.)
4. "O tempo está um bocado estranho hoje." (The weather is a bit strange today.)
5. "Achei este lugar muito estranho." (I found this place very strange.)