Discipuli in schola manent usque ad meridiem.

Discipuli is nominative plural.

• Singular: discipulus = student / pupil
• Plural: discipuli = students / pupils

It is nominative plural here because it is the subject of manent: the students are the ones doing the staying.

There are two main clues:

• Discipuli is in the nominative plural, the case usually used for the subject.
• Manent is third person plural, so it matches a plural subject: they stay/remain.

So discipuli ... manent naturally means the students stay.

Manent comes from maneo, manere, meaning to remain, to stay, or to wait/stay behind depending on context.

Here it means something like:

• stay
• remain

Grammatically, manent is:

• present tense
• active voice
• indicative mood
• third person plural

So it means they stay or they remain.

Because in can take two different cases depending on the meaning:

• in + ablative = in / on / at a place, with no motion into it
• in + accusative = into / onto, showing motion toward the inside of something

Here the students are already located at the school; they are staying there, not moving into it. So Latin uses in schola.

• in schola = in/at school
• in scholam = into the school

Schola is ablative singular.

The noun is schola, scholae (school), a first-declension noun. After in meaning location, Latin uses the ablative, so:

• schola = ablative singular
• in schola = in school / at school

Classical Latin does not have articles like English the or a/an.

So:

• discipuli can mean students or the students
• schola can mean school or the school
• meridiem can mean midday/noon or the midday/noon, depending on context

You understand whether English needs the from the situation and the natural translation.

Usque ad means all the way up to, until, or right up to.

In this sentence, it marks the endpoint of time:

• usque ad meridiem = until noon / up to noon

The word usque strengthens the idea of continuation right up to that point. Latin often uses usque ad where English simply says until.

The preposition ad normally takes the accusative case. That is why the noun appears as meridiem.

So:

• dictionary form: meridies
• accusative singular: meridiem

Here ad meridiem means up to noon or until midday.

Yes. Meridiem comes from meridies, meaning midday, noon, or sometimes south in other contexts.

It is related to the phrase post meridiem (after midday) and ante meridiem (before midday), which give us P.M. and A.M.

In this sentence:

• usque ad meridiem = until noon

Yes. In natural English, both may be possible depending on context.

Latin in schola literally means in the school, but idiomatic English often prefers:

• at school
• sometimes in school

So a natural translation might be:

• The students stay at school until noon.

Latin word order is more flexible than English because the noun endings show the grammar.

So all of these could express essentially the same basic idea:

• Discipuli in schola manent usque ad meridiem.
• In schola discipuli usque ad meridiem manent.
• Usque ad meridiem discipuli in schola manent.

The original order is clear and straightforward, but Latin does not depend on word order as heavily as English does.

Yes. Both are good translations.

• The students stay in school until noon.
• The students remain in school until noon.

Remain sounds a little more formal in English, while stay is more natural in everyday speech. Latin manent can cover both ideas.

Meridies, meridiei is usually treated as a fifth-declension noun.

That is why its accusative singular is meridiem.

So in the sentence:

• nominative: meridies = midday / noon
• accusative: meridiem after ad

This is a useful noun to recognize because it appears in time expressions and in familiar phrases like post meridiem.