Synonyms and Antonyms for 1st-class-mail

1. middle-class (adj.)

occupying a socioeconomic position intermediate between those of the lower classes and the wealthy

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3. class (n.)

a body of students who are taught together

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6. class (n.)

a league ranked by quality

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7. mail (v.)

send via the postal service

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9. mail (n.)

the system whereby messages are transmitted via the post office

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10. 1st (adj.)

indicating the beginning unit in a series

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