last but not least Definition

last¹
adj

1. Being, coming or occurring at the end of a series or after all others.

Thesaurus: concluding, final, closing, definitive, terminal; Antonym: first, initial.
2. Usually applied to dates, time, etc: most recent; happening immediately before the present (week, month, year, etc).
3. Only remaining after all the rest have gone or been used up.

Example: gave him her last sweet
4. Least likely, desirable, suitable, etc.

Example: the last person to expect help from
5. Final.

Example: administered the last rites

adverb

1. Most recently.

Example: When did you see her last?
2. Lastly; at the end (of a series of events, etc).

Example: and last she served the coffee

Idiom: at last (at long last)

In the end, especially after a long delay.
Thesaurus: finally, in the end, at length, at long last, in conclusion, in due course, eventually.

Idiom: at the last minute

At the last possible moment. Compare last-minute.

Idiom: last but not least

Finally but not less importantly.

Idiom: last thing

colloq
After doing everything else, especially before leaving or going to bed.

Idiom: on its last legs

colloq
Near to being no longer usable; worn.

Idiom: on one's last legs

usually euphemistic
Near to death or total collapse.
Thesaurus: exhausted, failing, worn out, dying, moribund, at death's door, with one foot in the grave, fading fast.

Idiom: the last

The person or thing that is at the end or behind the rest.

The end; last moment, part, etc.
Example: That's the last of the milk
Thesaurus: close, finish, end, completion, conclusion, ending, windup, finale, termination; Antonym: beginning, start.

The final appearance or mention.
Example: We haven't heard the last of him

Idiom: to the last

Until the very end, especially until death.

Etymology: Anglo-Saxon latost latest.