†(a) In early use, an interjection of vague meaning, corresponding approximately to the modern O! or Oh! Obsolete. (b) Used to direct attention to…

Used to direct or draw vision or attention; ‘see’, ‘observe’, ‘take note’, ‘mark this’. transitive. With interrogative clause as object. Cf. sense 2b.

A call to attract attention; also, an exclamation expressing exultation, incitement, surprise, etc.; sometimes used in the burden of a song with no…

A shout or exclamation used to attract attention.

‘Observe’, ‘take note’; placed at the head of a statement of which notice is to be taken. Frequently with that-clause. Cf. nota bene, int. n.

Cf. what, int. conj.n. 3. Now archaic or affected.

An exclamation used to attract attention, to express warning, surprise, etc., or to incite or encourage action; hey! Later (colloquial (frequently in…

Used to call attention; = lo, int.1

Used to enjoin silence, attract attention, or call on a person to listen. Also (after use in sense 2) in hist-a-boy. Now somewhat archaic.

‘Note well’, ‘observe carefully’, ‘take special notice’.

transitive. In direct and indirect questions with what, as what do you see in him (also her, it,etc.)?, I don't know what you see in him (also her…

Used to attract attention or give warning, esp. surreptitiously. Also more generally: used to represent a hiss.