What is the meaning of да?

vein, sinew

big

and

and (connecting verb phrases)

but, however

yes

so, well, indeed (emphatic particle)

yes?, right?, isn't it?

father

yes

and

but

because, since

even though, although

and

so that

Used to mark a subjunctive aspect: may...

now

even (expresses surprise)

With interrogative pronouns, forms negative indefinites.

... да ... да = both ... and ...

before

to, up to, till, until

with respect to, concerning, regarding

word used to indicate agreement or acceptance: yes

used to express a command

used to express a wish

used to make offers, suggestions or ask advice

used to ask questions

particle: used to mark an infinitive, to (or in some other cases, such as with modal verbs, it is not translated)

if

father

to do

(word used to indicate agreement or acceptance) yes

if

really

to (particle)

let, may

in order to

that

to

yes

yes (used to confirm that the person being addressed is listening)

right, isn't it (used at the end of an affirmative sentence, turning what was said into a question, asking for confirmation)

really (used to express surprise or ask for confirmation)

a "yes"

an affirmation in support of a cause (as used in slogans or appeals)

let, may [with finite verb]

and

but

Used as an emphasiser, usually at the start of a sentence or phrase. In many cases, emphasises impatience or irritation, but in others may simply emphasise surprise or an observation.

Used as an emphasiser before an imperative verb to express urgency.

da, deca- (x 10)

that

in order to, to

to (when the subjects of both clauses are not the same)

to (when the subjects of both clauses are the same; for western Serbo-Croatian use infinitive instead of да + present tense)

if (= кад)

(with ка̏о) as if, like

(а + да + не) without

(а + и + да) even if

lest

yes

used when starting a question

in combination with other words, expressing wish, command etc.

Source: wiktionary.org