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adjectivepossible but not necessary; left to personal choiceOpposite:
Definition that contains optional
- punks a youth subculture closely associated with punk rock music in the late 1970s; in part a reaction to the hippy subculture; dress was optional but intended to shock (plastic garbage bags or old school uniforms) and hair was dyed in bright colors (in Mohican haircuts or sometimes spiked in bright plumes)
- extension a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename
- filename extension a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename
- optionally in an optional manner
- file name extension a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename