Singular number refers to one person, thing, or concept.
In Greek, singular is marked in both nouns/adjectives (by endings) and verbs (by personal endings).
Singular noun endings (examples):
• First declension: -α/-η (nom), -ας/-ης (gen), -ᾳ/-ῃ (dat), -αν/-ην (acc)
• Second declension: -ος (nom), -ου (gen), -ῳ (dat), -ον (acc)
Singular verb endings (present active):
• 1st person: -ω (λύω - I loose)
• 2nd person: -εις (λύεις - you loose)
• 3rd person: -ει (λύει - he/she/it looses)
Examples from Texts
Here are some words showing the singular number in actual Greek texts:
φιλόπονον
φιλόπονος
laborious, industrious
noun
nominative
neuter
singular
ὀφειλέτης
ὀφειλέτης
debtor
noun
nominative
masculine
singular
πολυμαθεστάτην
πολυμαθής
having learnt
noun
accusative
feminine
singular
συγκαταθετικός
συγκαταθετικός
assenting, approving
noun
nominative
masculine
singular
ἐπιτειχισμῷ
ἐπιτειχισμός
against
noun
dative
masculine
singular
εἰκοσαγράμματον
εἰκοσαγράμματος
of twenty letters
noun
nominative
neuter
singular
εὐαπόρρυτον
εὐαπόρρυτος
easily flowing away
noun
nominative
neuter
singular
ὁμόστοιχον
ὁμόστοιχος
in the same line
noun
nominative
neuter
singular