## Nearby words

first, first aid, first amendment, first and foremost, first and last, first axiom of countability, first balkan war, first base, first baseman, first blood, first blush

## Definition for first axiom of countability (2 of 2)

## axiom of countability

### noun Mathematics.

the property satisfied by a topological space in which the neighborhood system of each point has a base consisting of a countable number of neighborhoods (first axiom of countability) or the property satisfied by a topological space that has a base for its topology consisting of a countable number of subsets of the space (second axiom of countability).

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Do You Know The Hidden Meanings Of These Popular Emoji?

Are There Any Words Without Rhymes?

English Could Really Use These 9 Wunderbar German Words

It’s OK To Use “They” To Describe One Person: Here’s Why

What Does “Resilience” Mean, And Why Was It Trending On Thursday Night?

These Japanese Slang Terms Are “Maji” Amazing