| verb | extend in one or more directions “The dough expands” |
| verb | become larger in size or volume or quantity “his business expanded rapidly” |
| verb | make bigger or wider in size, volume, or quantity “expand the house by adding another wing” |
| verb | grow vigorously “The deer population in this town is thriving” |
| verb | exaggerate or make bigger “The charges were inflated” |
| verb | add details, as to an account or idea; clarify the meaning of and discourse in a learned way, usually in writing “She elaborated on the main ideas in her dissertation” |
| verb | expand the influence of “The King extended his rule to the Eastern part of the continent” |
| expansible | adjective | able to expand or be expanded |
| expandible | adjective | able to expand or be expanded |
| expansive | adjective | able or tending to expand or characterized by expansion |
| boom | noun | a state of economic prosperity |
| elaboration | noun | a discussion that provides additional information |
| lucubration | noun | a solemn literary work that is the product of laborious cogitation |
| expatiation | noun | a discussion (spoken or written) that enlarges on a topic or theme at length or in detail |
| exposition | noun | an account that sets forth the meaning or intent of a writing or discourse |
| enlargement | noun | a discussion that provides additional information |
| expansion | noun | a discussion that provides additional information |
| expository | adjective | serving to expound or set forth |
| exponent | noun | someone who expounds and interprets or explains |
| expounding | noun | a systematic interpretation or explanation (usually written) of a specific topic |
| dilation | noun | a lengthy discussion (spoken or written) on a particular topic |