(IELTS4000) portion | Definition: section or quantity within a larger thing; a part of a whole | (NGSL) portion | Definition: part of a whole | | (ESS4000) portion | Definition: A portion of something is a part of it. | Example: →I only ate a small portion of the pizza. | | (ESS4000) proportion | Definition: A proportion is an amount that shows the link between the parts and the whole. | Example: →Only a small proportion of the people in this town actually work here. |