Once vs. Ones

Onceadverb

(frequency) One and only one time.

‘I have only once eaten pizza.’;

Onesnoun

(sports) A senior or first team (as opposed to a reserves team).

Onceadverb

(temporal location) Formerly; during some period in the past.

‘He was once the most handsome man around.’; ‘I once had a bicycle just like that one.’;

Onesadverb

Once.

Onceadverb

(mathematics) Multiplied by one: indicating that a number is multiplied by one.

‘Once three is three.’;

Onceadverb

As soon as.

Onceadverb

(obsolete) At a future time.

‘If the facts once became known, we'd be in trouble.’;

Onceconjunction

As soon as; when; after.

‘We'll get a move on once we find the damn car keys!’; ‘Once you have obtained the elven bow, return to the troll bridge and trade it for the sleeping potion.’; ‘Once he is married, he will be able to claim the inheritance.’;

Oncenoun

The ounce.

Onceadverb

For one time; by limitation to the number one; not twice nor any number of times more than one.

‘Ye shall . . . go round about the city once.’; ‘Trees that bear mast are fruitful but once in two years.’;

Onceadverb

At some one period of time; - used indefinitely.

‘My soul had once some foolish fondness for thee.’; ‘That court which we shall once govern.’;

Onceadverb

At any one time; - often nearly equivalent to ever, if ever, or whenever; as, once kindled, it may not be quenched.

‘Wilt thou not be made clean? When shall it once be?’; ‘To be once in doubtIs once to be resolved.’;

Onceadjective

belonging to some prior time;

‘erstwhile friend’; ‘our former glory’; ‘the once capital of the state’; ‘her quondam lover’;

Onceadverb

on one occasion;

‘once I ran into her’;

Onceadverb

as soon as;

‘once we are home, we can rest’;

Onceadverb

at a previous time;

‘once he loved her’; ‘her erstwhile writing’;