Ο μετρητής είναι έξω.

ο is the masculine singular definite article, equivalent to the.

So ο μετρητής means the meter. In Greek, the article usually has to agree with the noun in gender, number, and case. Here:

• ο = masculine, singular, nominative
• μετρητής = masculine, singular, nominative

Greek uses articles very naturally and often more regularly than English does.

You can tell mainly from the article ο.

Also, many Greek nouns ending in -τής are masculine, so μετρητής fits a very common pattern.

This is grammatical gender, not biological sex. Even an object can be masculine in Greek.

A few related forms are:

• ο μετρητής = the meter
• του μετρητή = of the meter
• οι μετρητές = the meters

είναι is the present tense form of είμαι (to be).

In this sentence, it means is. A useful thing to know is that είναι is also the form for they are.

So:

• ο μετρητής είναι = the meter is
• οι μετρητές είναι = the meters are

It does not change for gender:

• ο ... είναι
• η ... είναι
• το ... είναι

έξω is usually an adverb meaning outside / outdoors / out.

In a sentence like this, it gives the location:

• είναι έξω = is outside

Unlike adjectives, έξω does not change form for masculine, feminine, neuter, singular, or plural. It stays έξω.

Because έξω can stand on its own when the meaning is simply outside.

If you want to say outside something, then you normally add από:

• Ο μετρητής είναι έξω από το σπίτι. = The meter is outside the house.

So:

• έξω = outside
• έξω από + noun = outside of / outside from

No. Greek word order is more flexible than English word order.

The most neutral version is:

• Ο μετρητής είναι έξω.

But you may also hear:

• Έξω είναι ο μετρητής.
• Είναι έξω ο μετρητής.

These alternatives usually change the focus or emphasis, not the core meaning. The original version is the safest neutral order for a learner.

Normally, no—not in an ordinary sentence like this.

Ο μετρητής is the natural way to say the meter. Leaving out the article can sound unnatural, incomplete, or like a special style such as a label, heading, or very marked speech.

For normal everyday Greek, keep the article:

• Ο μετρητής είναι έξω.

A simple pronunciation guide is:

• Ο = o
• μετρητής = meh-tree-TEES
• είναι = EE-ne
• έξω = EK-so

So the whole sentence sounds roughly like:

o meh-tree-TEES EE-ne EK-so

The main stresses are on:

• μετρητής
• είναι
• έξω

The accent marks show which syllable is stressed.

In this sentence:

• μετρητής → stress on the last syllable
• είναι → stress on the first syllable
• έξω → stress on the first syllable

Modern Greek spelling uses accent marks consistently, so they are important both for pronunciation and for correct writing.

Not always.

μετρητής can mean a meter, counter, gauge, or another kind of measuring device, depending on context.

In everyday life, people often use it for things like:

• electricity meter
• water meter
• gas meter

So the exact English word can vary a little depending on the situation.