adverb:

• one by one; one at a time; in turn

temporal noun / suffix:

• one by one; each; one at a time

adverb / ~の noun:

• one by one; one each; one at a time ➜ ずつ

noun / ~の noun:

• firing one shot at a time; single-shot gun ➜ 単発銃【たんぱつじゅう】
• having only one engine; single-engined aeroplane; single-engined airplane ➜ 単発機【たんぱつき】
• one-shot (e.g. story); non-serial; one-off; single occasion

noun:

• one's time at a certain point (at various points) of a race

noun:

• Buddhist service in which the eight scrolls of the Lotus Sutra are read one scroll at a time (one morning and one evening reading each day for four days with a different reciter each time)

adverb:

• stepwise; one step at a time

noun:

• financially scraping by; meagre existence (meager); hand to mouth existence
• living one's life without plan; living life day-by-day; taking life one day at a time