| Main Entry | R | I | S | M | B | C | N |
| Saadia, ben Joseph | X | ||||||
| Saadiah [Saadya], Gaon | X | X | |||||
| Sabda | X | ||||||
| Sabellianism | X | ||||||
| Sacerdotalism | X | ||||||
| Sadducee-ism | X | ||||||
| Saguna | X | ||||||
| Saint-Simon, Claude Henry, Count De | X | X | |||||
| Sakti | X | ||||||
| salva veritate | X | ||||||
| salvation | X | ||||||
| Samadhi | X | ||||||
| Samanya | X | ||||||
| Same and Other | X | ||||||
| Samnyasin | X | ||||||
| Samsara | X | ||||||
| Samskara | X | ||||||
| San cheng | X | ||||||
| San chiao | X | ||||||
| San kang | X | ||||||
| San piao | X | ||||||
| Sanction | X | ||||||
| sanction, moral | X | ||||||
| Sanga | X | ||||||
| Sankara | X | ||||||
| Sankhya | X | ||||||
| Sankhya-karika | X | ||||||
| Santayana, George | X | X | X | ||||
| Sartre, Jean Paul | X | X | |||||
| Sarva-darsana-sangraha | X | ||||||
| Sarvakartrtva | X | ||||||
| Sarvam khalv idam brahma | X | ||||||
| Sarvasti-vada | X | ||||||
| Sastra | X | ||||||
| Sat | X | ||||||
| Sat-cit-ananda, saccidananda | X | ||||||
| Satire | X | ||||||
| satisficing | X | ||||||
| Sattva | X | ||||||
| Satya | X | ||||||
| Satyagraha | X | ||||||
| Saussure, Ferdinand de | X | ||||||
| Sautrantika | X | ||||||
| Scepticism [Skepticism] | X | X | X | ||||
| Scepticism, Fourteenth Century | X | ||||||
| Scheler, Max | X | ||||||
| Schelling, Friedrich Wilhelm Joseph von | X | X | X | ||||
| Schema | X | X | |||||
| Schiller, Ferdinand Canning Scott | X | ||||||
| Schiller, Friedrich | X | ||||||
| Schism | X | X | |||||
| Schleiermacher, Friedrich Ernst Daniel | X | X | X | ||||
| Schlick, Moritz | X | X | |||||
| Scholasticism | X | X | X | X | |||
| Schopenhauer, Arthur | X | X | X | ||||
| Schröder, (Friedrich Wilhelm Karl) Ernst, | X | ||||||
| Schrodinger, Erwin | X | ||||||
| Schutz, Alfred | X | ||||||
| science and the Church | X | ||||||
| Science of Science | X | ||||||
| Science, philosophy of | X | ||||||
| scientia | X | ||||||
| Scientific Empiricism; Unity of Science Movement | X | ||||||
| scientific explanation | X | ||||||
| scientific knowledge, social dimensions of | X | ||||||
| scientific method | X | ||||||
| scientific progress | X | ||||||
| scientific realism | X | ||||||
| scientism | X | ||||||
| Scotism | X | X | |||||
| Scottish philosophy | X | ||||||
| Scottish philosophy, in the 18th Century | X | ||||||
| Scottish philosophy, in the 19th Century | X | ||||||
| Scotus, John Duns | X | ||||||
| Searle, John | X | X | |||||
| secession | X | ||||||
| Secondary Qualities | X | X | |||||
| sect and sects | X | ||||||
| secularism | X | ||||||
| Secunda Petri | X | ||||||
| Secundi adjacentis | X | ||||||
| Secundum quid | X | X | |||||
| Selective Theories of Sensa | X | ||||||
| Self | X | ||||||
| Self-Consciousness | X | ||||||
| Self-Consciousness, phenomenological approaches to | X | ||||||
| self-deception | X | ||||||
| self-defense | X | ||||||
| Self-determination | X | ||||||
| Self-Evidence | X | X | |||||
| Selfhood | X | ||||||
| Self-knowledge | X | ||||||
| Self-love | X | ||||||
| Self-Realization | X | ||||||
| Sellars, Wilfrid | X | X | X | ||||
| Selves, Knowledge of other | X | ||||||
| semantic theory | X | ||||||
| Semantics | X | X | X | ||||
| semantics, functional role | X | ||||||
| semantics, naturalized | X | ||||||
| Semasiology | X | ||||||
| Semiosis | X | ||||||
| Semiotic; Theory of Signs | X | ||||||
| semiotics | X | ||||||
| semiotics, Medieval | X | ||||||
| Semi-Pelagianism | X | ||||||
| Sempiternal | X | ||||||
| Sempiternity | X | ||||||
| Seneca | X | X | |||||
| Sensa | X | ||||||
| Sensation | X | X | |||||
| Sensationalism | X | X | |||||
| sense | X | ||||||
| sense / reference | X | ||||||
| Sense and denotation | X | ||||||
| Sense Datum | X | X | X | ||||
| Sense Manifold | X | ||||||
| Sense, internal | X | ||||||
| Sensibility | X | ||||||
| Sensing | X | ||||||
| sensualism | X | ||||||
| Sensum | X | ||||||
| Sensum-Theory | X | ||||||
| Sentence | X | ||||||
| Sentences (Scholastic) | X | ||||||
| Sentential calculus | X | ||||||
| Sentential function | X | ||||||
| Sentience | X | ||||||
| Sentimentalism | X | ||||||
| set theory | X | ||||||
| Seth Pringle-Pattison | X | ||||||
| Sextus Empiricus | X | X | |||||
| Shaftesbury, Anthony Ashley Cooper, Third Earl of | X | X | X | X | |||
| Shaktism, Saktism | X | ||||||
| Shamanism | X | ||||||
| Shan | X | ||||||
| Shang ti | X | ||||||
| Shang t'ung | X | ||||||
| Shannon, Claude | X | ||||||
| Shao K'ang-chieh | X | ||||||
| Shao vin | X | ||||||
| Shao yang | X | ||||||
| Sharpe, Johannes | X | ||||||
| Sheffer stroke | X | ||||||
| Shen | X | ||||||
| Shen Jen | X | ||||||
| Shen tu | X | ||||||
| Sheng (jen) | X | ||||||
| Shih | X | ||||||
| Shih | X | ||||||
| Shih fei | X | ||||||
| Shiites | X | ||||||
| Shiva, Siva | X | ||||||
| Shivaism, Sivaism, Saivism | X | ||||||
| short term memory | X | ||||||
| Shpet, Gustav | X | ||||||
| Shu | X | ||||||
| Shu shu | X | ||||||
| Shuo | X | ||||||
| Sibylline Books | X | ||||||
| Siddhi | X | ||||||
| Sidgwick, Henry | X | X | X | ||||
| Siger of Brabant | X | ||||||
| Sign | X | ||||||
| Signate | X | ||||||
| Signification | X | ||||||
| Signifies | X | ||||||
| Sign-Language | X | ||||||
| silicon chip replacement | X | ||||||
| Similarity, Law of | X | ||||||
| Similia similibus percipiuntur | X | ||||||
| Similitude) (Scholastic) | X | ||||||
| Simmel, Georg | X | ||||||
| Simon of Faversham | X | ||||||
| Simon, Herbert | X | ||||||
| Simple Enumeration | X | ||||||
| simpliciter | X | ||||||
| simplicity | X | ||||||
| Simplicius | X | ||||||
| Simplification (Simp.) | X | ||||||
| Simpson's paradox | X | ||||||
| Simulacrum | X | ||||||
| Simultaneity | X | ||||||
| sin | X | ||||||
| sine qua non | X | ||||||
| Singer, Peter | X | ||||||
| Singular proposition | X | X | |||||
| Singular terms, medieval theories of | X | ||||||
| Sinn / Bedeutung | X | ||||||
| Skepticism [scepticism] | X | X | X | X | X | ||
| skepticism, ancient Greek | X | X | |||||
| skepticism, Cartesian | X | ||||||
| skepticism, contemporary | X | ||||||
| skepticism, modern | X | ||||||
| skepticism, moral | X | ||||||
| Skinner, B. F. | X | ||||||
| Skolem paradox | X | ||||||
| slavery, ethical aspect of | X | ||||||
| Smart, J.J.C. | X | ||||||
| Smith, Adam | X | X | |||||
| Social Contract | X | X | X | X | |||
| Social Contract, contemporary approaches to | X | ||||||
| social Darwinism | X | ||||||
| social democracy | |||||||
| social minimum [basic income] | X | ||||||
| socialism | X |