English Dictionary

Next in order after the third; the ordinal of four.
Source : opted (62321)  - auto

Forming one of four equal parts into which anything may be divided.
Source : opted (62322)  - auto

One of four equal parts into which one whole may be divided; the quotient of a unit divided by four; one coming next in order after the third.
Source : opted (62323)  - auto

The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of any key.
Source : opted (62324)  - auto