day letter (English, noun)
expansion: day letter (plural day letters)
Senses:
topics: communications
electrical-engineering
engineering
natural-sciences
physical-sciences
telecommunications
telegraphy
glosses: A telegram sent during the day for slightly deferred delivery on the same day, cheaper than a fast telegram, typically with a minimum charge for 50 words or less.
tags: historical
Forms:
form: day letters
tags: plural