A lot vs. Alot: 9 Grammatical Pitfalls
modified to improve performance
"tidy, sophisticated teen" (usually contrasted with rocker), 1960, slang shortening of modern.
short for modification, c.1920, originally among aviators.
Modern; up-to-date, esp in the styles of the 1960s: shows off her attributes in a mod wardrobe (1960s+)