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so long

so long

1 6.3
A casual word for goodbye used when leaving someone
  • idiom
  • /soʊ lɔŋ/
  • Informal
: adiós
  • It was nice meeting you, so long!

Examples

  • So long as we can find the right photographer.

  • Oh, Supernatural, I'm about to say goodbye, so long and thanks for all the fish.

    Blog text (29)
  • So long, Chip.

  • So long, y'all.

  • After our conversation, I waved and said, 'So long!'

  • With a smile, she turned to her friends and said, 'So long, everyone!'

Synonyms

bye
vsso long
  • Informal
∞ 1.0

A short word or action people use when they leave each other

is more informal and relaxed than this basic parting word
goodbye
vsso long
747 1.0

Words people say when they leave each other

is more casual and conversational than this neutral farewell
good-bye
vsso long
653 1.0

Words or actions people use when they leave

is more informal and conversational than this standard term
goodby
vsso long
  • Archaic
434 3.0

A short phrase people say when they leave each other

is more casual and colloquial than this conventional expression
bye-bye
vsso long
  • Informal
397 1.1

A friendly informal way to say goodbye when leaving

is casual but more adult and less playful than this
see ya
vsso long
  • Texting
222 8.4

A friendly way to say goodbye when you expect to meet again

is casual but slightly less slangy than this phrase
good day
vsso long
  • Formal
176 1.0

A polite or formal way to say goodbye when parting

is more casual and informal than this polite departure phrase
adios
vsso long
  • Informal
50 7.2

A word people use to say goodbye

is more plain and native conversational in everyday speech
adieu
vsso long
  • Literature
30 9.3

A final goodbye you say when leaving for a long time

is casual and used for ordinary brief partings rather than deep farewells
au revoir
vsso long
28 8.5

A polite way to say goodbye when you expect to see someone again

is more casual and less marked by foreign politeness
sayonara
vsso long
25 8.6

A goodbye used when someone leaves for a long time

is casual and usually implies a temporary parting rather than finality
ta ta
vsso long
  • UK
20 8.7

A casual way to say goodbye to someone

is equally casual but slightly more neutral in tone
cheerio
vsso long
  • UK
14 8.9

A friendly way to say goodbye

is more neutral and broadly casual rather than distinctly warm
toodle
vsso long
  • Archaic
14 9.9

A playful word people use to say goodbye

is more plain and straightforward than this playful expression
arrivederci
vsso long
11 9.8

A friendly way to say goodbye

is plainer and more commonly used in casual conversation
auf wiedersehen
vsso long
8 9.8

A German phrase people use to say goodbye

is more plain and conversational than that borrowed formal phrase
pip pip
vsso long
  • Archaic
4 9.9

A friendly old-fashioned British way to say goodbye

is more modern and commonly used in everyday casual speech
good-by
vsso long
2 4.4

Words or actions people use when they leave each other

is less formal and more relaxed than that routine expression
ta ta for now
vsso long
  • UK
1 9.5

A friendly informal way to say goodbye when you will see or speak to someone soon

is casual too but does not always imply a near reunion
9.9

A funny way to say goodbye when leaving a group

is simpler and used in everyday casual speech without irony

Antonyms

∞ 1.0

A short greeting you say when you meet someone or answer the phone

Surface Forms

so long singular
so longs plural

Morphology

so + long

Although the constituents 'so' (to such an extent) and 'long' (for a great length of time) are individually transparent, the use of 'so long' as an informal farewell is a conventionalized pragmatic meaning not directly deducible from the literal phrase. The literal sense ('for a long time') gives a partial clue linking to parting but does not reliably predict the goodbye function for a B1 learner without prior exposure.

Etymology

So long may come from an older use of the words so and long, which together meant 'for a long time' or 'until then'. People would say it like 'until we meet again', and it became a short, casual way to say 'goodbye'.