The ordinal form of the number twenty-three.

The person or thing in the twenty-third position. / One of twenty-three equal parts of a whole.

The ordinal form of the number thirty.

The person or thing in the thirtieth position. / One of thirty equal parts of a whole.

Some unspecified hour in the early morning (implies an unpleasant time to be awake).

Santorini (an island in Greece)

Of or from the Third World.

(historical, politics) Those countries not aligned with the west or the east during the Cold War. / (sometimes derogatory) The developing countries of Asia, Africa and Latin America.

(grammar) The form of a verb used (in English and other languages) with plural nouns and with the pronoun they (or its equivalents in other languages).

(grammar) The form of a verb used (in English and other languages) with singular nouns and with the pronouns he, she, it and one (or their equivalents in other languages).