icon, vector, symbol, icon set, clip art, design element, line icon, outline, single line, line art, stroke - illness, time, instrument of time, calendar date, calendar, cut out, diary, internet, personal organizer, day, month, week, weekend activities, weekday, office supply, organization, plan - document, planning, stationary, table, the past, to do list, vacations, advice, aggression, alarm, alertness, bell, bell tower - tower, burglar alarm, danger, doorbell, fire alarm, handbell, noise, obsolete, old-fashioned, reminder, ringing, notification icon,