Meaning of dà:
大
big; large; great; older (than another person); eldest (as in 大姐[da4 jie3]); see 大夫[dai4 fu5]
Zhè shì yī gè dà fángzi.
这是一个大房子。
This is a big house.
Gēge bǐ wǒ dà liǎng suì.
哥哥比我大两岁。
My brother is two years older than me.
Tā shì jiā lǐ zuì dà de jiějiě.
她是家里最大的姐姐。
She is the eldest sister in the family.
Wǒ de péngyǒu shì yīgè hěn yǒumíng de dàfū.
我的朋友是一个很有名的大夫。
My friend is a very famous doctor.
greatly; freely; fully
Tā duì zhè cì jīhuì chōngmǎnle dàdǎn de qīdài.
她对这次机会充满了大胆的期待。
She is filled with bold anticipation for this opportunity.
(dialect) father; (dialect) uncle (father's brother)
Tā shì wǒ de dà.
他是我的大。
He is my father.
Jīntiān wǒmen qù bàifǎng wǒ dàbó.
今天我们去拜访我大伯。
Today we are going to visit my uncle.