This is the 413th most frequent Tamil word.
ஓர
"ஓர" in Tamil means "one" or "a single."
In this sentence, 'ஓர' is used as an article meaning 'one', emphasizing a single entity.
ஓர மரம் தோட்டத்தில் நின்றது.
A tree stood in the garden.
Here, 'ஓர' specifies the quantity of 'one' in terms of time.
நான் ஓர நாளில் என் வேலை முடித்து விடுவேன்.
I will finish my work in one day.
In this instance, 'ஓர' qualifies 'glance', indicating the singularity of the act.