1. (noun) a definite length of time marked off by two instants

• time interval

2. (noun) the distance between things

• separation

3. (noun) the difference in pitch between two notes

• musical interval

1. (noun) a definite length of time marked off by two instants

• absence
• access time
• break
• intermission
• interruption
• pause
• suspension
• cycle
• rhythm
• round
• distance
• space
• embolism
• intercalation
• eternity
• float
• interim
• lag
• meantime
• meanwhile
• interlude
• latency
• latent period
• reaction time
• response time
• latency
• rotational latency
• latent period
• lead time
• lunitidal interval
• period
• processing time
• seek time
• slot
• time slot
• time constant

2. (noun) a set containing all points (or all real numbers) between two given endpoints

• bounded interval
• closed interval
• open interval
• unbounded interval
• sub-interval

3. (noun) the distance between things

• clearance

4. (noun) the difference in pitch between two notes

• fifth
• fourth
• half step
• semitone
• musical octave
• octave
• quarter tone
• quarter-tone
• seventh
• sixth
• step
• tone
• whole step
• whole tone
• third

1. (noun) a definite length of time marked off by two instants

• amount
• measure
• quantity

2. (noun) a set containing all points (or all real numbers) between two given endpoints

• set

3. (noun) the distance between things

• distance

4. (noun) the difference in pitch between two notes

• musical notation