Hello vs. Ok

Hellointerjection

A greeting (salutation) said when meeting someone or acknowledging someone’s arrival or presence.

Hellointerjection

A greeting used when answering the telephone.

Hellointerjection

A call for response if it is not clear if anyone is present or listening, or if a telephone conversation may have been disconnected.

Hellointerjection

(colloquial) Used sarcastically to imply that the person addressed or referred to has done something the speaker or writer considers to be foolish.

Hellointerjection

An expression of puzzlement or discovery.

Hellonoun

"Hello!" or an equivalent greeting.

Helloverb

(transitive) To greet with "hello".

Hellointerjection

An exclamation used as a greeting, to call attention, as an exclamation of surprise, or to encourage one. This variant of Halloo and Holloo has become the dominant form. In the United States, it is the most common greeting used in answering a telephone.

Hellonoun

an expression of greeting;

Hello

Hello is a salutation or greeting in the English language. It is first attested in writing from 1826.

Okadjective

(informal) lang=en

Oknoun

a state in south central United States

Oknoun

an endorsement;

Okadjective

being satisfactory or in satisfactory condition;

Okadverb

sentence-initial expression of agreement

Okinterjection

used to express agreement or acceptance

Okinterjection

used to introduce an utterance

Okinterjection

used at the end of a statement to invite agreement, approval, or confirmation

Okadjective

satisfactory but not especially good

Okadjective

in a satisfactory physical or mental state

Okadjective

permissible; allowable

Okadverb

in a satisfactory manner or to a satisfactory extent

Oknoun

an authorization or approval

Okverb

give approval to