延長|えんちょうenchou[0]heiban (flat)

1. noun, suru verb, transitive verb, intransitive verbextension; elongation; prolongation; lengthening
   宿泊しゅくはくをもう一いち晩ばん延長えんちょうできますか。↗

   Can I extend my stay one more night?
2. noun(total) length
3. nounextension (e.g. of one's work); continuation
4. noun, mathextension (of a line segment)
5. noun, philosophyextension (property of occupying space)
6. nounEnchō era (923.4.11-931.4.26)
7. noun, sportsextended game; overtime; extra time; extra innings

• Synonym伸長しんちょうWrittenFormal written word for stretching or growth, as in 「業績の伸長」; it stresses growing momentum, while 延長 is about length or an extended period.
• Synonym伸びるのびるNeutralIntransitive verb for stretching or lengthening, as in 「期限が延びる」; 延長 is a noun and, with 「する」, works as a transitive verb.
• Synonym引き伸ばすひきのばすNeutralTo stretch something or enlarge photos, and also to drag out time, as in 「会議を引き延ばす」; it often carries a nuance of deliberate stalling.
• Synonym引き伸ばしひきのばしNeutralNoun for putting things off or enlarging photos, as in 「引き延ばし作戦」; 延長 carries no nuance of deliberate delay.
• Related拡張かくちょうNeutralExpanding scope or scale, as in 「道路の拡張」 or 「拡張機能」; it stresses widening or enlarging, while 延長 stresses making something longer.
• Related継続けいぞくNeutralKeeping something going without interruption, as in 「契約を継続する」; the point is unbroken continuation, while 延長 is about stretching a deadline or period.
• Related持続じぞくNeutralA state or action being maintained over a long time, as in 「持続可能」; it stresses endurance, while 延長 stresses lengthening a period or length.
• Related存続そんぞくNeutralAn organization or system continuing to exist, as in 「存続の危機」; 延長 instead speaks of extending a period or length.
• Related繰り延べくりのべWrittenWritten word for pushing a schedule or deadline back, i.e. postponement, as in 「支払いの繰り延べ」; 延長 makes a duration or length longer.
• Related続けるつづけるNeutralVerb meaning to keep something going, as in 「勉強を続ける」; the most common choice in speech. 延長 focuses on extending a period.
• Related拡大かくだいNeutralEnlarging scale or scope, as in 「感染拡大」; the point is getting bigger, while 延長 is about getting longer.
• Related伸展しんてんWrittenWritten word for expanding influence or scale; rarely used. 延長 concerns length or deadlines and is not said of influence.
• Antonym短縮たんしゅくNeutralAntonym: shortening time or distance. It stands opposite to 「延長」 in terms of length and deadlines.

Use 「延長」 for extending a deadline or length, as in 「延長戦」 or 「会期延長」. For continuing without a break pick 「継続」, for lasting states 「持続」, for wider scale 「拡大」 or 「拡張」; the opposite is 「短縮」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 長ながさや距離きょりを長ながくすること。
2. 終期しゅうきを繰り延くりのべて期間きかんを長ながくすること。
3. 全すべてを足たした長ながさ。総そう距離きょり。
4. 《数学すうがく》線分せんぶんをその両方向りょうほうこうか一いち方向ほうこうに長ながくすること。
5. 《哲学てつがく》物体ぶったいが空間くうかんに占しめる存在そんざいのスタイル。
6. 繫つながっているもの。異ことなるが実質じっしつが似にているもの。つづき。
7. 日本にっぽんの元号げんごうの一ひとつ。延喜えんぎの次つぎで、承平しょうへいの前まえ。923年ねん4月がつ11日にちから931年ねん4月がつ26日かまでの期間きかんのこと。