quarter-hour

Sixty-minute fraction, one-fourth

A quarter-hour is fifteen minutes—one fourth of an hour.

The term appears in scheduling and time-telling: The train departs on the quarter-hour.

Quarter-hourly means occurring every fifteen minutes.

We waited a quarter-hour before anyone arrived.

timekeeping

clock

Device displaying time

watchPortable timekeeping device
timerDuration-tracking mechanism
stopwatchInterval timing device

chime · timepiece · carillon

scheduling

timeslot

Designated broadcast period

appointmentScheduled time for something
bookingAdvance arrangement secured
sessionScheduled time for activity

slot · consultation · meeting · reservation · availability · interval · block · calendar · planner · agenda

duration

segment

Distinct part of whole

spanDistance between endpoints
stretchPull to extend
blockSolid mass, or impede

window · chunk · slice · portion · increment · unit · allotment

punctuality

prompt

Incite to action

on-timeAt the scheduled moment
timelyOccurring when appropriate
sharpFine-edged, or astute

punctual · precise · clockwork · exactness · deadline · reliable · meticulous

billing

increments

Units of increase

billableAble to be invoiced
invoicingIssuing payment requests
rateMeasured speed or charge

prorated · charge · metered

Categories

time unitssecond, minute, seconds, day, minutes
scheduling termsASAP, appointment, meeting, booking, reservation

Opposites

time duration scale

quarter-hourhalf-hour

Thirty-minute span

hour · eternity · instant · moment · second

Family

hour, quarter, quarters, quart, hourly, quarterly, quartered, quarterback, quartering

Familiarity: Top 100,000
Profile: Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G