A kontaktlencse kicsi.

Here, a is the definite article, so it usually means the.

Hungarian has two definite articles:

• a before a consonant sound
• az before a vowel sound

So:

• a kontaktlencse = the contact lens
• az alma = the apple

If you wanted a/an in the indefinite sense, you would use egy.

Because Hungarian often leaves out the verb to be in the present tense, third person when the predicate is a noun or an adjective.

So:

• A kontaktlencse kicsi. = The contact lens is small.

There is no van here, even though van is the usual dictionary form for is.

This omission happens in sentences like:

• A ház nagy. = The house is big.
• A fiú tanár. = The boy is a teacher.

But in other persons or tenses, the verb appears:

• Kicsi vagyok. = I am small.
• Kicsi volt. = It was small.

In Hungarian, adjectives come before a noun when they directly describe it inside a noun phrase:

• kis kontaktlencse = small contact lens

But in A kontaktlencse kicsi, kicsi is not just modifying the noun. It is the predicate of the sentence, meaning is small. That is why it comes after the subject.

So compare:

• kis kontaktlencse = small contact lens
• A kontaktlencse kicsi. = The contact lens is small.

Both relate to the idea small/little, but they are not used in exactly the same way.

A very useful rule for learners is:

• kis is the usual form before a noun
• kicsi is very common when it stands by itself as the predicate

So:

• kis kontaktlencse = small contact lens
• A kontaktlencse kicsi. = The contact lens is small.

You may sometimes hear kicsi before a noun too, especially in speech, but kis is the safest normal choice in that position.

A rough English-friendly pronunciation is:

• a kontaktlencse ≈ aw KON-takt-len-che
• kicsi ≈ KI-chi

A few helpful points:

• stress is normally on the first syllable of each word
• cs is pronounced like ch in chair
• Hungarian pronunciation is usually quite regular

So kicsi sounds like KI-chi, not like kik-see.

It is basically an international-style compound, built from:

• kontakt = contact
• lencse = lens

So it is not an old native word in the same way as some everyday Hungarian words, but it behaves completely normally as a Hungarian noun.

Most directly, it means The contact lens is small.

However, Hungarian often uses the definite singular to talk about a whole class in a general way. So in the right context, A kontaktlencse kicsi could also be understood more generally, something like:

• The contact lens is small
• A contact lens is small
• Contact lenses are small

English and Hungarian do not always handle generic statements in the same way, so context matters.

Yes. That is also grammatical.

The difference is mainly word order and emphasis:

• A kontaktlencse kicsi. = neutral statement; the contact lens is the topic
• Kicsi a kontaktlencse. = puts more focus on small

Hungarian word order is more flexible than English word order, and changing the order often changes the focus or emphasis, not the basic meaning.

No grammatical gender is involved here.

Hungarian nouns are not masculine, feminine, or neuter in the way many European languages are. So:

• kontaktlencse has no grammatical gender
• kicsi does not change for masculine/feminine/neuter

That makes this part simpler for English speakers: you do not need to learn gender agreement for adjectives.

If the noun becomes plural, though, the sentence changes:

• A kontaktlencsék kicsik. = The contact lenses are small.

So number matters, but gender does not.